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Colon Cancer Screening

Padma Ravichandran, Cancer Prevention and Treatment Fund

Colorectal Cancer (more commonly know as colon cancer) is cancer of the colon (large intestine) or rectum, both of which are part of the digestive system. The digestive system removes nutrients and minerals from the food we eat and beverages we drink, and uses them to help our body function. [1] The colon’s job is to remove water from the food that has been digested. The colon then passes the remains to the rectum, where they are eventually released from the body as fecal matter.[2]

In most cases, people with colon cancer don’t have any symptoms.[3]  However, possible symptoms of colon cancer include: blood in one’s stool, stomach aches and pains that do not go away, and weight loss that cannot be explained.  For information on how to prevent colon cancer, see “Colon Cancer: Who is at risk, and how can it be prevented?

Screening for colon cancer is especially important because when colon cancer is found in the early stages, patients do very well: 9 out of 10 people will be alive five years after their diagnosis and treatment.[4] Colon cancer develops from polyps, or abnormal growths in the colon. Not all polyps become cancerous, but all colon cancers develop from polyps. You can get polyps at any age, but they are more common as you get older.[5] Colon cancer screening checks for these polyps, but it does not show whether the polyp is cancerous or precancerous. The only way to know is to remove the polyp and analyze it.

Screening Methods

There are several methods for colon cancer screening. For a quick look at the advantages and disadvantages of each method, see the chart at the end of this article

There has been a gradual increase in screening rates over the last ten years but even so, only about half of the U.S. population at highest risk gets screened for colon cancer. Studies show that people who don’t get screened are less likely to be insured and less likely to have a primary care physician.  In addition, it is widely known that screening for colon cancer is not fun.  And, some people believe that they do not need to get screened because they are healthy. It is not unusual for a person to get a positive test result (indicating polyps or something that is not normal), but not return for the follow-up test.

While there are various ways to screen for colon cancer, a colonoscopy is usually performed when any of the screening tests show abnormal results and follow-up is necessary. A flexible tube with a tiny camera is used to look inside the colon (the whole colon) and to remove any polyps found. Colonoscopy is used for both screening and treating  which is why it has become the most widely used screening method. It is important to know that a study published in the February 2012 issue of the New England Journal of Medicine found that colonoscopies are even more effective at preventing deaths from colon cancer than previously thought-reducing deaths by more than half.[6]

Researchers in the study found that patients who received colonoscopies and had noncancerous or pre-cancerous growths (polyps) removed, were much less likely to die from colon cancer than people in the general population. People in the general population may not have been screened for colon cancer or may have used different, less effective screening methods. The researchers, who followed most patients for almost 16 years but followed some people for as long as 23, concluded that there was a 53% reduction in the death rate from colon cancer in patients who had colonoscopies and then had polyps removed.6 While the study does not establish whether colonoscopies are better than other screening methods in reducing deaths from colon cancer, it brings welcome news.

The results of the NEJM study reinforce the importance of prevention. The United States Preventive Services Task Force (USPSTF) and the Center for Disease Control and Prevention (CDC) recommend that everyone get screened for colon cancer using FOBT, sigmoidoscopy, or colonoscopy starting at age 50 and continuing until age 75. They do not recommend the Stool DNA Test or Computed Tomography Colonography (“Virtual Colonoscopy”) because there is not enough evidence about the risks and benefits of each of these methods.[7]

USPSTF Recommended Screening Methods

Fecal Occult Blood Test (FOBT)

There are two types of FOBT: the Guaiac and Immunochemical tests. They are both take-home tests that detect the presence of blood in stool. The patient is asked to use a brush or Q-tip like tool to obtain a sample of stool. At the doctor’s office or lab they will run the tests and check for blood or the chemical units that make up blood.[8]

Doctors check for blood because it can indicate that a polyp in the colon or rectum broke and started to bleed.[9]

The guaiac-based fecal occult blood test (gFOBT) uses the chemical guaiac to test for heme.  Heme is part of the protein hemoglobin that is in blood, and it contains the iron that our body uses.[10] To make sure that this test is accurate, you will have to avoid certain foods starting two days before providing the stool sample. You should eat a diet high in fiber, but avoid red meats, vitamin C, and foods that might irritate your digestive system. Unfortunately, the results often inaccurately show that there is blood in the stool when there isn’t, which is why more testing is needed afterwards.

The immunochemical fecal occult blood test (iFOBT) uses antibodies to find blood in the stool. Research shows that the iFOBT is more accurate at detecting blood than the gFOBT and it does not require you to limit what you eat. The drawback, however, is that it is also more expensive. The iFOBT can cost anywhere from $18-$40, while the gFOBT costs a few dollars. Most insurance providers will pay for this test and it is also covered under Medicare once a year.[11]

The CDC recommends getting a FOBT every year.[12] If you have a positive FOBT, meaning there is blood in your stool, then your doctor may recommend that you get a follow-up colonoscopy to check for polyps.

Sigmoidoscopy

The sigmoidoscopy uses a lighted flexible tube (called a sigmoidoscope) with a tiny camera attached to examine the lower section of the colon and the rectum. The tube is inserted through the anus, up the rectum, and into the lower section of the colon. The procedure requires that the lowest part of the colon and rectum be clear of solids. In general, the doctor will prescribe a laxative and/or enema two hours before the procedure. The doctor may also ask the patient to restrict his or her diet to clear liquids for 1-3 days before the procedure.[13]

During the procedure, the doctor looks for inflamed tissue, abnormal growths and ulcers. Doctors can pass tools through the tube and remove any polyps or abnormal tissue. The growths can then be analyzed to determine if it is cancerous or not. Depending on the outcome of the test, the doctor may recommend getting a colonoscopy to check for polyps in the entire colon.

The sigmoidoscopy only lasts about twenty minutes, requires little preparation, and causes only mild discomfort. You may experience some cramping and bloating after the procedure but it usually only lasts about an hour. The drawback is that during the procedure there is a small chance of the colon or rectum tearing. Even though the procedure is less invasive than the colonoscopy, doctors are recommending the colonoscopy more often than the sigmoidoscopy.  Most doctors do not have the equipment for a sigmoidoscopy.  In addition the insurance reimbursement is less for the sigmoidoscopy than the colonoscopy.[14]

CDC recommends getting a sigmoidoscopy every five years. If the doctor finds polyps during the procedure he or she may recommend that you get a follow up colonoscopy.

Colonoscopy

 A colonoscopy is essentially a more comprehensive version of the sigmoidoscopy. The colonoscopy examines the entire colon and rectum using a longer lighted tube called a colonoscope. Similar to the sigmoidoscopy, the patients must clear their colon of solids before undergoing the procedure. The difference is that the colonoscopy requires that the entire colon be cleared, which requires more preparation. The doctor may tell you to go on a clear liquid diet 1-3 days before the procedure. In addition, your doctor will prescribe a laxative, and/or enema the night before the procedure. The laxative can be taken in pill or powder form. The powder form must be dissolved in water and is unpleasant. No matter the method of colon cleansing, the patient will need to use the bathroom several times, usually over several hours.

Because this procedure is so invasive, going even farther into the colon, you will be given anesthesia or some other sedative. Any time you are given anesthesia or medicine to make you less awake or sleepy, there is an added risk.[15] The colonoscope is inserted into the anus, up through the rectum, and into the colon. The doctor can check for inflamed tissue, ulcers, and abnormal growths and remove them if necessary. The removed tissue will then be analyzed to check if it is cancerous or not. The colonoscopy is usually recommended as a screening tool and a follow-up tool. This means that the procedure can be used to initially check for abnormal tissue, or it can be used when any of the other test results are positive for the presence of polyps.[16]

The procedures and recovery time for the colonoscopy is a little longer than the sigmoidoscopy. After the procedure, you will have to wait in the clinic for 1-2 hours until the sedative wears off. You will also need to make arrangements for someone to pick you up, because the doctor will not allow you to drive or take a taxi. As with the sigmoidoscopy, you may also experience cramping or bloating.

Due to how comprehensive and invasive the procedure is, the CDC recommends that you undergo a colonoscopy every 10 years. If they do find polyps during the procedure, they may ask you to repeat the procedure in less than 10 years.

Other Screening Methods

Stool DNA Test

The Stool DNA Test checks for any abnormal cells in the stool. For this test you need to collect an entire bowel movement, which may be unpleasant for some people, and send it in to the lab. There, they will look for certain DNA markers that indicate the presence of cancerous cells. Researchers have found that the Stool DNA Test is not very accurate or reliable. Its ability to detect colon cancer ranges from 20-71% so it is not cost effective to get this test.

Double Contrast Barium Enema (DCBE)

The DCBE uses x-rays and the metallic element Barium to examine the colon. They first clean out the colon and rectum using an enema that contains a solution with Barium. The Barium outlines the colon and rectum so it is more visible in the x-ray. There, doctors will be able to see any polyps or cancerous lesions.

The DCBE is effective at detecting certain growths, but often misses smaller polyps that may become cancerous. In most cases, the cancers that are found during the DCBE can also be found with a colonoscopy. Another concern is the amount of radiation you are exposed to during the procedure.  The DCBE has more exposure to radiation than the CT Colonography, which may lead to other adverse health problems.

Computed Tomography Colonography (CT Colonography)

CT Colonography-often called “Virtual Colonoscopy”-uses x-rays to create detailed visual images of the entire colon and rectum. However, in order to get good x-ray images, the colon and rectum must be cleared of solids by way of a clear liquid diet, enema, and/or laxative. As mentioned above, the laxative may be taken in pill or powder form. The powder form must be dissolved in water and is unpleasant. No matter the method of colon cleansing, the patient will need to use the bathroom several times, usually over several hours.

Once the x-ray images have been taken, a computer is used to assemble the pictures together to create a detailed picture of your colon and rectum. If the picture shows polyps or other abnormalities, a regular colonoscopy will be needed immediately to remove them.

Patients tend to prefer the CT Colonography because it is less invasive and causes less discomfort. This method is effective at identifying abnormal growths, but is not effective at identifying abnormal lesions that are flat or depressed. Another concern with the CT Colonography is exposure to radiation from the x-rays, which can increase your risk of getting cancer in the future even as it helps diagnose whether you have cancer currently.  Since the need to clear colon and rectum of solids with a laxative or enema is generally considered the worst part of a colonoscopy, the small advantages of the CT Colonography probably does not outweigh the decrease in accuracy and increase in radiation.

 

Procedure

Advantages

Disadvantages

   FOBT

·  Preparation for the test is minimal

·  Sample can be collected at home

·  Very inexpensive

·  Getting “false-positive” results is common (you may be told you have a problem or something abnormal when you don’t).

·  Does not effectively detect all polyps and cancers

·  You must avoid certain foods for a  few days before collecting stool sample

·  Positive results may require additional tests, such as colonoscopy

 Sigmoidoscopy

·  Quick procedure with minimal discomfort

·  Doctor can remove polyps during procedure

·  Only requires that the lowest part of the colon be clear

·  Does not examine the entire colon—only the lowest part of the colon and the rectum

·  Small risk of bleeding or tearing in colon

·  Positive results may require additional tests, such as colonoscopy

 Colonoscopy

·  Doctor can view entire colon and rectum whereas sigmoidoscopy only looks at lower colon

·  Doctor can remove polyps during procedure

·  Is one of the most sensitive colon cancer screening tests available

·  May not find all polyps or growths

·  Preparation involves clearing entire colon through clear liquid diet and/or enema

·  Patient sedated during procedure

·  Procedure time varies depending on how many polyps are found

·  Patient must be picked up or driven home by someone else afterwards

·  Small risk of bleeding or tearing in colon

 Stool DNA Test

·  Preparation for the test is minimal

·  Not invasive, so no risk of bleeding or tearing

·   Must provide entire bowel movement for testing

·  Not always accurate or reliable

 Double Contrast Barium Enema

·  Doctor can view entire colon and rectum

·  Complications rare

·  No sedation necessary

·  May not find all polyps or growths

·  Preparation involves thorough cleansing of entire colon through clear liquid diet, enema, and/or laxatives

·  “False-positive” results possible

·  Doctor cannot remove polyps during procedure

·  Positive results may require colonoscopy or other additional procedures

 CT Colonography

 

 “Virtual  Colonoscopy”

·  Doctor can view entire colon and rectum

·  Not invasive, so no risk of bleeding or tearing

·  May not find all polyps or growths

·  Preparation involves thorough cleansing of entire colon through clear liquid diet, enema, and/or laxatives

·  You will be exposed to some radiation (see “Everything You Ever Wanted to Know About Cancer and Radiation but Were Afraid to Ask”)

·  Positive results will require follow-up colonoscopy; recommended immediately after virtual procedure to avoid a second appointment and to biopsy lesions quickly

 

References:

  1. National Cancer Institute. Colorectal cancer PDQ: General information about colorectal cancer. 2009.   Retrieved 22 Feb 2010 from the National Cancer Institute Web Site:  http://www.cancer.gov/cancertopics/pdq/screening/colorectal/Patient/page2
  2. National Institute of Health and National Library of Medicine. 2008. Large intestine. Retrieved on 24 Feb 2010 from the  MedLine Web Site: http://www.nlm.nih.gov/medlineplus/ency/imagepages/19220.htm
  3. Center for Disease Control and Prevention. 2009. Colorectal cancer: Screening saves lives. Retrieved on 23 Feb 2010 from the Center for Disease Control and Prevention Web Site:  http://www.cdc.gov/cancer/colorectal/pdf/SFL_brochure.pdf
  4. Center for Disease Control and Prevention. Colorectal cancer screening rates. 2010. Retrieved on 24 Feb 2010 from the Center for Disease Control and Prevention Web Site: http://www.cdc.gov/cancer/colorectal/statistics/screening_rates.htm
  5. National Cancer Institute. Dictionary of cancer terms: Adenoma. 2009. Retrieved on 24 Feb 2010 from the National Cancer Institute Web Site:  http://www.cancer.gov/dictionary/?CdrID=46217
  6. Zauber AG, Winawer SJ, O’Brien M.J, Lansdorp-Vogelaar I, van Ballegooijen M, Hankey BF, et al.  Colonoscopic polypectomy and long-term prevention of colorectal-cancer deaths.  New  England Journal of Medicine.2012; 366(8), 687-696.
  7. United States Preventive Services Task Force. Screening for colorectal cancer. 2008. Retrieved on 18 Feb 2010 from the Agency for Healthcare Research and Quality Web Site:  http://www.ahrq.gov/clinic/uspstf/uspscolo.htm
  8. Center for Disease Control and Prevention. Colorectal cancer screening basic fact sheet. 2009. Retrieved on 23 Feb 2010 from the Center for Disease Control and Prevention Web Site:  http://www.cdc.gov/cancer/colorectal/pdf/Basic_FS_Eng_Color.pdf
  9. Chen, JH and Lin, HH. Colorectal cancer screening. Tzu Chi Medical Journal. 2009; 21 (3), 190-196.
  10. National Cancer Institute. Colorectal cancer screening. 2009. Retrieved on 18 Feb 2010 from the National Cancer Institute Web Site:  http://www.cancer.gov/cancertopics/factsheet/Detection/colorectal-screening
  11. Levi, Z, Rozen, P, Hazazi, R.  A quantitative immunochemical fecal occult blood test for colorectal neoplasia. Annotated Internal Medicine. 2007; 146, 244-255.
  12. Center for Disease Control and Prevention.Colorectal cancer screening tests. 2010. Retrieved on 22 Feb 2010 from the Center for Disease Control and Prevention Web Site: http://www.cdc.gov/cancer/colorectal/basic_info/screening/tests.htm
  13. National Institute of Health. Flexible sigmoidoscopy. 2008. Retrieved on 24 Feb 2010 from the National Digestive Diseases Information Clearinghouse Web Site: http://digestive.niddk.nih.gov/ddiseases/pubs/sigmoidoscopy/
  14. Klabunde, CN, Lanier, D, Nadel, M, McLeod, C, Yuan, G, Vernon, SW. Colorectal cancer screening by primary care physicians: Recommendations and practices 2006-2007. American Journal of Preventive Medicine. 2009; 37 (1), 8-16.
  15. National Institute of Health. Colonoscopy. 2010. Retrieved on 24 Feb 2010 from the National Digestive Diseases Information Clearinghouse Web Site: http://digestive.niddk.nih.gov/ddiseases/pubs/colonoscopy/
  16. Neri, E, Faggioni, L, Cerri, F, Turini, F, Angeli, S, Cini L, Perrone, F, Paolicchi, F, Bartolozze, C.  CT colonography versus double-contrast barium enema for screening of colorectal cancer: comparison of radiation burden. Abdominal Imaging. 2009.

Cigarette Makers Defend Menthol to U.S. FDA Panel

Lisa Richwine, Reuters: March 31, 2010

WASHINGTON, March 31 (Reuters) – Tobacco companies defended menthol cigarettes to a U.S. advisory panel on Wednesday as health advocates called for a government ban on the popular flavoring.

About 19 million Americans smoke menthol cigarettes. Health advocates say the flavor masks the harshness of tobacco, making it easier to start smoking and harder to quit.

Manufacturers told a Food and Drug Administration panel that adding menthol did not make a cigarette more harmful or addictive.

“Overall the weight of scientific evidence indicates menthol does not change the inherent health risks of cigarette smoking,” said James Dillard, a senior vice president at Altria <MO.N>, which sells menthol versions of its Marlboro brand cigarettes.

The panel of outside experts is studying the health effects of menthol and is due to submit a report by March 2011. The FDA eventually could ban menthol, although some activists and industry analysts doubt that will happen. Stronger warnings or advertising limits are other possibilities.

Any government action against menthol could be a blow to Lorillard, the nation’s third-largest cigarette company and maker of the top-selling menthol brand Newport.

A 2009 law that gave the FDA oversight of tobacco products banned other cigarette flavors such as chocolate, clove and fruit that could lure children. But Congress exempted menthol, the most popular flavoring with about 27 percent of the cigarette market, and instead called for an FDA review.

The issue is racially sensitive as blacks overwhelmingly favor menthol and suffer more from smoking-related illnesses and deaths than whites. A government survey showed 83 percent of adult black smokers chose menthol cigarettes.

The American Academy of Pediatrics and others urged a ban on menthol flavoring, telling the FDA panel that it appealed to young people.

“Menthol has become the industry’s last holdout and last hope for disguising the taste of tobacco… we should not allow companies to sweeten the poison,” said Brandel France de Bravo of the National Research Center for Women & Families, a consumer group. […]

Read the original article here.

 

Statement of Brandel France de Bravo, MPH, Cancer Prevention and Treatment Fund, to the Tobacco Products Scientific Advisory Committee on Menthol Cigarettes

Brandel France de Bravo, MPH, Cancer Prevention and Treatment Fund, March 31, 2010

I am pleased to have the opportunity to testify on behalf of the National Research Center for Women & Families, and its Cancer Prevention and Treatment Fund.  I have a Master’s in Public Health from Columbia University, and in addition to my position at the National Research Center for Women & Families, I am an Associate of the Johns Hopkins Bloomberg School of Public Health in the Department of Health, Behavior & Society.

Our Center is dedicated to improving the health and safety of adults and children, and we do that by scrutinizing medical and scientific research to determine what is known and not known about specific treatments and prevention strategies.  We do not accept contributions from companies that make medical products or from the tobacco industry.

I should disclose that my mother has stage IV lung cancer but she was never a smoker of menthol cigarettes.

Like most smokers, she began smoking as a teenager. We know from what we heard yesterday that adolescents are more likely to smoke menthol cigarettes than adult smokers. We also know that while smoking is declining among adults and adolescents, menthol cigarettes are becoming more popular among both adults and kids ages 12-17.

Anything that makes smoking more attractive or tolerable in adolescence-whether it’s a flavor or the perception that the models in ads for menthol cigarettes are younger- will only add to our country’s burden of addiction and lung disease, including lung cancer. We know that if kids can get through adolescence without smoking, they stand an excellent chance of never smoking. Dr. Rising shared with us yesterday these facts:  about 90% of smokers tried their first cigarette before 18, and about 70% were smoking daily by age 18.

We also learned yesterday from Dr. Hoffman that menthol smokers-young and old-appear more dependent on cigarettes by many measures than non-menthol smokers. Among 2,000 secondary school kids surveyed in 2006, Black youth scored highest on all the measures of dependence, which included number of cigarettes smoked in their lifetime, number of days per month they smoke; shortest time since last cigarette; and likelihood of being a daily smoker.

We know that African Americans are more likely to smoke menthol cigarettes than any other racial or ethnic group, and that magazines and billboards targeted to African Americans are far more likely to advertise menthol cigarettes than non-menthol cigarettes.

The literature review presented yesterday raised as many questions as it answered. It’s clear that more research needs to be carried out, and members of this committee have suggested many worthwhile topics. As scientists, we’re primed to ask questions and ask that research be done to answer them.  As public health experts, however, I think we can agree on a few things without doing any additional research. Some of our most vulnerable populations, including communities with huge health disparities, appear to be the most susceptible to menthol’s appeal: adolescents, Blacks, Hispanics, and women. And as a result, they will develop lifelong habits that will lead to disease and disability.

As their overall U.S. market declines, cigarette manufacturers have seized on menthol’s competitive advantage, introducing light menthol brands for new and young smokers who prefer that, and stronger menthol cigarettes for the more experienced and older smokers who crave that. Now that all flavors other than menthol have been banned, menthol has become the industry’s last holdout and last hope for disguising the taste of tobacco.

Several studies cited by Dr. Hoffman suggest that part of the problem with menthol is that it masks problems: smokers of menthol cigarettes may not be able to perceive changes in health as readily. A spoonful of sugar makes the medicine go down, but cigarettes aren’t medicine. They are the main cause of lung cancer, the #1 cause of cancer deaths, and they are poisonous to our health. We should not allow companies to sweeten the poison. Industry will try to convince us that the research on the dangers of menthol cigarettes isn’t convincing; there will be pressure to study and stall, but I am here today to beg you: don’t drink the Kool-Aid. Just because it’s cool and refreshing, doesn’t mean it won’t kill you.

We urge you to advise banning menthol cigarettes just as other flavored cigarettes have been banned.

Statement by Brandel France de Bravo, MPH, Cancer Prevention and Treatment Fund, on Indoor Tanning and Tanning Devices

Brandel France de Bravo, MPH, Cancer Prevention and Treatment Fund, March 25, 2010

I am pleased to have the opportunity to testify on behalf of the National Research Center for Women & Families, and its Cancer Prevention and Treatment Fund.  I have a Master’s in Public Health from Columbia University and am an Associate of the Johns Hopkins Bloomberg School of Public Health in the Department of Health, Behavior & Society.

Our Center is dedicated to improving the health and safety of adults and children, and we do that by scrutinizing medical and scientific research to determine what is known and not known about specific treatments and prevention strategies.  We do not accept contributions from companies that make medical products.

One in ten Americans, including teenagers, visit indoor tanning facilities where they are exposed to UVA and sometimes UVB rays. Both types of UV exposure are known to increase the risk of various types of skin cancer, and last year the World Health Organization’s International Agency for Research on Cancer (IARC) declared tanning beds “carcinogenic to humans.”

Of the 30 million Americans who use tanning devices each year, approximately 2 million are adolescents between the ages of 11 and 18 (Cokkinides et al, Cancer 2009). Adolescent girls are particularly heavy users, with one study reporting that by age 17, as many as 35% of adolescent girls are tanning using FDA-cleared devices (AC Geller et al, Pediatrics, 2002). Research shows that almost all people who use tanning devices use them more often than the FDA’s recommended limits.  So, it’s not surprising that 58% of the teenagers surveyed by Cokkinides et al. reported burns from indoor tanning. And we know that burns, especially when you are young, greatly increase the risk of skin cancer.

Although the FDA’s executive summary mentions how many people are employed in companies that make indoor tanning devices or sell them, those numbers should not influence this advisory committee.  It is irrelevant to your job today, and should be irrelevant to the FDA’s decision.

Currently tanning devices that are not used for dermatologic disorders-the kind of devices used at the tanning salon in the mall-are considered Class I devices. These are devices classified as having the lowest risk to the consumer and include bandages and tongue depressors. Given that tanning devices emit UV radiation and have been labeled carcinogenic by IARC and other leading scientific bodies, it is time that the FDA re-classify these devices.

The question you will need to answer today is:  Should tanning devices be Class II or Class III?  The Patient, Consumer, and Public Health Coalition, of which my organization is a member, recently wrote to Commissioner Hamburg recommending that tanning devices be considered Class III because a device that increases the likelihood of developing the most serious type of skin cancer and that has no real health benefits should be given the highest level of scrutiny by the FDA.  I have brought a copy of that letter for this meeting record. Although UV radiation-regardless of the source-stimulates the skin to synthesize Vitamin D, there are far safer ways to increase your Vitamin D, such as through supplements.

We recommend that the FDA regulate indoor tanning devices as Class III devices and require that they go through the PMA process. Admittedly, it’s difficult to figure out how to conclude that these devices are safe and effective.  They clearly aren’t safe…and what are they effective at? The U.S. does not need innovative new tanning devices unless they are safer than current devices.  The only way to ensure that is through the PMA process.  Clearing tanning devices through the 510(k) process as substantially equivalent to other, equally unsafe tanning devices is not in the interest of public health in the U.S.

Over 250,000 people are diagnosed with non-melanoma skin cancers in the U.S. every year and over 68,000 are diagnosed with melanoma, with 8,000 dying from it every year. The costs of these cancers to our health care system are enormous.  I hope you will advise the FDA not to contribute to this epidemic of cancers by pretending that indoor tanning is risk-free.

In addition to reclassifying tanning devices, we ask that today’s panel consider the following:

1. While tanning facilities tend to rely heavily on UVA rays, many use varying proportions of UVB rays to speed the tanning process (93% to 99% UVA and 7% to 1% UVB). We recommend that a standard be set for the UVA/UVB mix that is the least dangerous, based on the science, while recognizing that NO mix is justifiably safe for a product that has no real benefits. This should apply to all such devices, whether for use by a dermatologist, or use by a tanning salon.

2. Tanning facilities should be required to screen people for skin type and people with a family history of skin cancer.  Fair-skinned people with Skin Type I (unfortunately, these are the  people most likely to use tanning beds) or people with a family history of skin cancer should be told that tanning devices are not approved by FDA for their use.

3. Tanning salons should be required to exclude anyone under 21, as recommended by the American Association of Pediatrics.  If this is not done, we would agree with the American Academy of Dermatology recommendation banning tanning devices for minors.  At the very least, parents should be required to sign an informed consent form in person at the time that the minor is using the tanning facility. Otherwise, these parental consent forms will be forged by the teenagers and will serve no function.

4. Indoor tanning facilities should be required to post prominently displayed, large “black box” warnings in waiting/reception areas and also on or next to the machine itself. These warnings would briefly describe risks and mandated limits on use (time per exposure, amount of UV radiation per exposure, and number of exposures per year).  Customers should be limited to a certain number of visits per year to the same tanning facility or chain of tanning salons.  (It would be preferable but clearly impossible to limit the total number of visits to all salons, since they are unlikely to share customer lists with one another.)

5. Patients should have to sign something indicating that they have read a patient disclosure or a “note of understanding.” This would include the number of tanning sessions per year that is the FDA approved limit, and patients should be able to take home with them an easy-to-understand brochure, written at the 6th grade reading level, that explains all the risks of indoor tanning as well as skin cancer warning signs.

More than half of all states have passed some type of restriction on the use of tanning beds, particularly when it comes to minors using them. It’s time for the FDA to take the lead and reclassify all tanning devices as Class III devices, requiring approval through the PMA process. It took our country until 1985 to get explicit warnings on cigarette packages about the risk of lung cancer and other diseases. Let’s put prominent warnings on tanning beds before we cost the U.S. more lives and healthcare dollars.

 

Update 5/29/2014: FDA has new warnings about indoor tanning risks.

Want to get free house cleaning?

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Harmful Chemical Found in Fruit Juices

Julie Bromberg, Cancer Prevention and Treatment Fund

A 2010 study found that some fruit juices contain too much antimony, a potentially harmful chemical. This study of juices sold in Europe found that certain juices have over twice as much antimony as is allowed in drinking water in Europe and the United States. Should we stop drinking fruit juices?  At this point, the answer is no.[1]

There is no reason to panic. First, there are no studies of antimony in fruit juices or other drinks in the United States, so we don’t know if they have high levels or not. Secondly, the study only tested 42 bottles, all of which were sold in Europe.

On the other hand, there is reason for concern and more research is needed. Little is known about the health effects of long-term exposure to low doses of antimony, but scientists are concerned that antimony can cause cancer and damage the reproductive system of men and women.[2] Scientists are particularly concerned about children because they are more likely to drink juices than adults, and children tend to be more vulnerable to the negative health effects of chemicals. And, remember that most fruit juices are high in sugar and calories.[3] So, there is little benefit to drinking large quantities of fruit juices, and that might be a better reason to cut back.

Antimony is a metal that exists in very low levels in our environment. Small amounts of antimony are often present in our air, drinking water, and food. You can also be exposed to antimony through skin contact with soil, water, or other substances that contain antimony.[4]

Antimony is used to create a type of plastic called polyethylene terephthalate (PET), which is frequently used as packaging material in the food industry. Researchers believe that antimony can leach out of the PET packaging and into the juice (or other drinks/food), but they are not sure if PET is actually the source of antimony in fruit juices. Since antimony can come from a variety of places in our environment, it is also possible that antimony could enter the juice before or during the manufacturing process.

Previous studies of bottled water in Europe and Canada also found traces of antimony, but in much lower concentrations than was found in the 2010 study.[5,6,7] Juices in the 2010 study had up to 17 times higher concentration of antimony than the bottled water that was analyzed in previous reports.

To protect our health, the first and easiest step is to determine if most or all of the antimony is coming from the fruit, the plastic, or the manufacturing process. Once that is determined, the next step is to determine how high the levels are in fruit juices and in other foods or beverages and in different countries. If high levels of antimony are common, it will be important to do the more complicated research needed to find out if antimony increases the risk of cancer or other diseases.

References:

  1. Hansen C, Tsirigotaki A, Bak SA, Pergantis SA, Sturup S., Gammelgaard B, and Hansen HR. (2010).  Elevated antimony concentrations in commercial juices.  Journal of Environmental Monitoring, DOI: 10.1039/b926551a.
  2. Choe S-K, Kim S-J, Kim H-G, Lee JH, Choi Y, Lee H, and Kim Y.  (2003)  Evaluation of estrogenicity of major heavy metals.  The Science of the Total Environment, 312: 15-21.
  3. American Academy of Pediatrics, Committee on Nutrition. (2001) The use and misuse of fruit juice in pediatrics.  Pediatrics, 107(5): 1210-1213.
  4. Agency for Toxic Substances and Disease Registry (ATSDR). (1992) Toxicological profile for antimony. Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service.  Accessed March 3, 2010 at: http://www.atsdr.cdc.gov/toxprofiles/phs23.html
  5. Westerhoff P, Prapaipongb P, Shockb E, and Hillaireau A.  (2008). Antimony leaching from polyethylene terephthalate (PET) plastic used for bottled drinking water.  Water Research, 42(3): 551-556
  6. Shotyk W, Krachler M, and Chen B. (2006).  Contamination of Canadian and European bottled waters with antimony from PET containers, Journal of Environmental Monitoring, 8: 288-292
  7. Keresztes S, Tatár E, Mihucz VG, Virág I, Majdik C, and Záray G. (2009)  Leaching of antimony from polyethylene terephthalate (PET) bottles into mineral water.  Science of the Total Environment, 407: 4731-4735

 

Letter to Maine House of Representatives on the Children’s Wireless Protection Act

February 26, 2010

The Honorable
State Representative
Maine House of Representatives
2 State House Station
Augusta, ME 04333

Dear Representative:

As nonprofit organizations dedicated to improving public health, we strongly support the “Children’s Wireless Protection Act.”  This legislation would require cell phones sold in Maine to include a prominent warning label on the phone and its packaging stating that the device may cause brain cancer, that children and pregnant women should be particularly cautious, and that people should keep the phones away from their heads and bodies.

The frequent, heavy use of cell phones is a relatively recent phenomenon, and since cancers usually take at least 10-20 years to develop, it will be years before research is likely to conclude whether cell phones cause cancer or not.  A good analogy is smoking: smoking causes lung cancer and most smokers start in their teens, but smokers don’t develop lung cancer for at least 25-35 years.

If we wait 20 years to determine the exact cancer risks of cell phones, it will be too late to protect ourselves or our family members.  The evidence of risk is growing.  A review of 18 studies of cell phones and brain tumors, published in Occupational and Environmental Medicine in 2007, concluded that studies of individuals using cell phones for more than 10 years “give a consistent pattern of an increased risk for acoustic neuroma and glioma,” with the risk being highest for a tumor on the same side of the head that the phone is used.1

A 2009 meta-analysis of 11 studies published in peer-reviewed journals on long-term cell phone use and the risk of developing brain tumors concluded that using a cell phone for ten or more years “approximately doubles the risk of being diagnosed with a brain tumor” on the side of the head where the cell phone user holds the phone.2 We are very concerned about the possible long-term risks associated with the use of cell phones for adults and children.  The brains of children under 8 absorb twice as much radiation from cell phones as adult brains, according to a 2008 study published in Physics in Medicine and Biology.3 A Swedish researcher found that people who begin using cell phones (and cordless landline phones) before the age of 20 are at an even higher risk of developing brain tumors than people who begin using them as adults.4, 5

Research also indicates that cell phone radiation harms sperm and may reduce male fertility.6 The solution: men of reproductive age who would like to have children should shut off their phones before putting it in their pants pockets or anywhere below the waist.  Of course, the radiation is much lower when a phone is on but not in use than when a person is speaking on the phone, but since a cell phone can sit in a man’s pocket for most of the day, the cumulative exposure while the phone is on is still substantial.

The cell phone industry insists that its phones are safe, but the industry tends to focus on studies they fund themselves and that draw conclusions favorable to their business.  Flaws in industry-funded studies include not evaluating on which side of the head the phone was used, rarely including business customers with corporate accounts (who tend to be the heaviest cell phone users), defining “regular cell phone users” as those who use cell phones at least one call per week, and publishing studies of adults who have used cell phones for less than 9 years.7 It is not surprising that such poorly designed studies have not found a significant increase in brain cancers linked to cell phones.

Meanwhile, prominent cancer researchers are urging people to reduce cell phone radiation exposures for themselves and their children.   Dr. Ronald Herberman, the director of the University of Pittsburgh Cancer Institute, warned his staff in July 2008 that the risks from cell phone radiation justified precautions, such as using ear pieces and minimizing cell phone usage by children.8

We strongly support this pioneering legislation, which would make Maine the first state to require warning labels that radiation from cell phones may cause brain cancer.  The “Children’s Wireless Protection Act” would provide Maine citizens with the information they need to decide whether they want to take precautions regarding cell phones.

Sincerely,

Annie Appleseed Project
Cancer Prevention and Treatment Fund of the National Research Center for Women & Families
Environmental Health Trust
Grassroots Environmental Education
Healthy Child Healthy World
HEAR (Health, Education and Resources, Inc.)
IHE (Institute for Health and the Environment of the University at Albany
Our Bodies Ourselves

For more information, contact Paul Brown at the Cancer Prevention and Treatment Fund of the National Research Center for Women & Families at pb@cente4research.org or (202) 223-4000.

PDF: Chlildren’s Wireless Wireless Protection Act

References:

1 Hardell L, Carlberg M, Soderqvist F, Hansson Mild K, Morgan LL (2007). Long-term use of cellular phones and brain tumours: increased risk associated with use for = 10 years. Occupational and Environmental Medicine 64(9):626-632.

2 Khurana VG, Teo C, Kundi M, Hardell L, Carlberg M (2009) Cell phones and brain tumors: A review including the long-term epidemiologic data. Surgical Neurology 72(3): 205-214.

3 Wiart J, Hadjem A, Wong MF, Bloch I. (2008) Analysis of RF exposure in the head tissues of children and adults. Physics in Medicine and Biology 53(13): 3681-3695 (15).

4 Hardell L, Carlberg M, Hansson Mild K. (2009) Epidemiological evidence for an association between use of wireless phones and tumor diseases. Pathophysiology 16 (2-3): 113-122.

5 Hardell L, Hansson Mild K, Carlberg M, Hallquist A. (2004) Cellular and cordless telephones and the association with brain tumours in different age group. Archives of Environmental Health 59 (3): 132-137.

6 De Iuliis GN, Newey RJ, King BV, Aitken RJ (2009) Mobile Phone Radiation Induces Reactive Oxygen Species Production and DNA Damage in Human Spermatozoa In Vitro. PLoS One 4(7):e6446.doi:10.1371/journal.pone.0006446. http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0006446 (Accessed August 17, 2009).

7 Schuz J, Jacobsen R, Olsen JH, et al. (2006) Cellular telephone use and cancer risk: Update of a nationwide Danish cohort. Journal of the National Cancer Institute 98: 1707-1713.

8 “Researcher warns of brain cancer risk from cell phones. July 24, 2008. The New York Times. http://www.nytimes.com/2008/07/24/technology/24iht-cellphone.4.14767955.html Complete warning from Herberman can be read at: http://www.upci.upmc.edu/news/pdf/The-Case-for-Precaution-in-Cell-Phone-Use.pdf

Statement of Diana Zuckerman at the Meeting of the FDA Risk Communication Advisory Committee

Diana Zuckerman, PhD, Cancer Prevention and Treatment Fund, February 25, 2010

I am pleased to have the opportunity to testify as president of the National Research Center for Women & Families and our Cancer Prevention and Treatment Fund.

Our Center is dedicated to improving the health and safety of adults and children, and we do that by scrutinizing medical and scientific research to determine what is known and not known about specific treatments and prevention strategies.  We then translate that complicated information into plain language so that patients, consumers, media, and policy makers will understand it.

We do not accept contributions from companies that make medical products.

In addition, I am a fellow at the University of Pennsylvania Center for Bioethics. Previously, I was on the faculty at Yale and Vassar and conducted research at Harvard, and I was trained in epidemiology at Yale Medical School.  I tell you this because my perspective is as a scientist but my work consists of explaining science to people who don’t have the training I have.  In fact, when we train interns and new staff, the hardest part is getting very smart, well-educated people to write so that the general public understands the health information they need.

The FDA materials we were asked to review look like homework assignments.  They seem as if they were written by people with graduate degrees for people with graduate degrees–or at least smart college grads.  But many Americans don’t go to college, and even high school grads often don’t read at the 12th grade level.  A lot of people don’t like to read at all, or don’t read well, and you need to make sure they can understand what they need to know.  That’s why it is important to communicate risk information at the 5th grade or 8th grade level instead.

Even educated people don’t want to read long, complicated materials–except possibly the most highly motivated people, and even they want to get the meat of the matter, not the extraneous information.  And, also remember that most medications in this country are taken by the elderly, and even those who are highly educated may not be able to read or concentrate as well as they did when they were younger.

Graphics are important, as you know. When the companies you regulate want to get people’s attention, they use TV ads and attractive graphics on print ads.  But whether or not you use great graphics, you can make the materials easier to read by using bold fonts, different size fonts, and more white space.  You can make the materials look more inviting, and less like work.

Overall, the FDA communications you provided to us use:

  • sentences that are too long,
  • words that are too technical or difficult for many readers, and
  • include too many unnecessary details

For example, it isn’t really necessary to include the date when a drug was approved by the FDA, because it doesn’t matter to the patient whether it was November 2004, January 2004, or 2006.  If you think that there are details that might be important to some patients, include it last or in a link.

Here‘s a booklet for breast cancer patients that we wrote with the National Cancer Institute and NIH.

It is geared to an 8th grade reading level.  Compare that to the materials that the FDA is using, such as the patient booklet that the FDA requires for women who are getting breast implants to help them understand the risks..  That booklet is about 45 pages long, 8.5 x 11″, unattractive and uninviting.  You have to get through half of it to get to some of the crucial risk information.  It’s so long that most women are not going to get past the first page or two.  I think we can all agree that breast implants are not more important or more complicated than breast cancer.  So why the difference between the two booklets?  There is a clear disconnect between what NIH is giving patients and what FDA is giving them, and the NIH is usually doing a better job.  I agree with the panel member who pointed out that the Office of Women’s Health at the FDA is also doing a better job at providing user-friendly information to patients and consumers.

The risk information for LASIK patients is similarly overly long and technical.  It has lots of great information but many patients are just not going to get that far into the booklet.  If we want them to get that information, the materials need to be shortened and made less technical.

I want to take a few minutes to make a few specific comments about the examples you provided for this meeting.  I will focus on the ones for patients.

I agree with what was said about the titles being too long.  “FDA Drug Safety Communication” should not be the beginning of the title.  Shorten that to “FDA Drug Safety Alert,” and make that a separate line, perhaps a logo on the top of the page.

The title “Risk of Progressive Multifocal Leukoencephalopathy (PML) with the Use of Tysabri (natalizumab)” is too long and too hard to read.  Why not call it “Risks of Tysabri (natalizumab)”?  That will get and keep people’s attention so they will want to read it, if they are on the drug or prescribed the drug.

FDA also needs to avoid phrases like “this medication has been associated with this risk.”  Most people don’t know what “has been associated” means.  I understand you can’t or might not want to say “causes this risk,” but you need a verb that has meaning to people.  Perhaps “increases the risk of” or “may cause in some people.”

Regarding the flu vaccine information you provided, why not just call it a “flu vaccine” not an “inactivated Influenza vaccine” or “attenuated influenza vaccine” or a “monovalent vaccine.”  People say “flu” and so should FDA, and most people will not understand or need to know exactly what kind of vaccine it is.

On the vaccine fact sheet that was apparently meant to reassure patients, here’s a typical sentence “Aluminum salts are incorporated into some vaccine formulations as an adjuvant to enhance the immune response in the vaccinated individual.” Who talks like that?  How about: “Aluminum salts are in some vaccines to make them more effective.”

That makes the point in a way that is much easier to understand.

In your previous discussion, there were some concerns about making sure patients know that there is a risk of death, when there is one, but also putting that in the context of other risks in their lives.  I think that numbers, such as “there have been 13 deaths reported in the last 12 years” is not always helpful, because the number of reported deaths may not represent the deaths caused by the product-it could be higher or lower.  And, when people ask their doctors about those numbers, there seems to be a tendency to down play them, especially if the physician hasn’t had a patient who died from that product.  And, for some people, x number of deaths might seem very high and for another it might seem very low.  So, it’s difficult to know how to present that information.

However, when there is a serious risk from a medical product, whether that risk is death or serious harm, I don’t think comparing that to other risks-getting hit by lightening or dying in a car accident, for example-is helpful for most people.  Unfortunately, these risks are cumulative.  All of us who use cars run the risk of having a car accident, for example, and we can lower that risk by driving more carefully, but that risk is always going to be there whether or not we use a medical product with additional risks.  It seems to me the comparison of risk should be to other medical products with the same benefits, or to no treatment at all.  That’s the additional risk posed by that particular medical product, and patients should know if the risk is rare, very rare, or as high as 1 in 100, or 1 out of 10, or whatever it is.

Thank you for the opportunity to share our thoughts with this distinguished panel, and the FDA staff who are working hard to improve FDA’s ability to inform patients and consumers.

Statement by Diana Zuckerman at the FDA’s meeting on strengthening the Center for Devices and Radiological Health’s 501(K) Review Process

Diana Zuckerman, PhD, Cancer Prevention and Treatment Fund, February 18, 2010

I am pleased to have the opportunity to testify as president of the National Research Center for Women & Families.

Our Center is dedicated to improving the health and safety of adults and children, and we do that by scrutinizing medical and scientific research to determine what is known and not known about specific treatments and prevention strategies.  We do not accept contributions from companies that make medical products.

In addition, I am a fellow at the University of Pennsylvania Center for Bioethics, and a board member for two nonprofit organizations that work to improve resources for the FDA: the Alliance for a Stronger FDA, and the Reagan Udall Foundation.

I was on the faculty at Yale and Vassar, was trained in epidemiology at Yale Medical School; and I have worked on FDA oversight issues in the U.S. Congress. I have also worked on health policy issues at the Institute of Medicine and for nonprofit organizations.

I tell you this because my perspective is different from most of the speakers this morning – I am a scientist and public health expert who has not worked for industry.However, my perspective is not as an outsider.My Dad enjoyed working for a major medical device company for his entire career and as a result my family has substantial stock in that device company.I well understand the important advances made by device companies, but the 510(k) process has major problems and requires major improvements.

At today’s meeting, we’ve heard of the problems with the 510(k) process from the FDA itself, and some of these presentations describe the problems very clearly.

What are the results of these problems?   We don’t know, because for many of the thousands of devices cleared through the 510(k) process, we don’t know how safe or how effective they are.  No objective studies are published.  No comparative effectiveness data are available to patients or physicians for most of these products.

Our Center is conducting a study of FDA’s Class I recalls.  Class I recalls should not be confused with Class I devices.  Class I recalls are those that the FDA states are needed because the product is likely to cause serious health problems or death.   The data are clear: the vast majority of Class I recalls are 510(k) products – some are even 510(k) exempt devices.  How could a low risk device result in a recall based on possible death or serious health risk?  That’s a good question.

I will give a few examples of the Class I recalls of 510(k) devices:

COMPLETE® MoisturePLUS™ Contact Lens Solution was recalled after 57 million bottles were sold.It was recalled because of infections caused by parasites that are normally killed by contact lens solution, but were not killed by this 510(k) product.The infections caused permanent corneal damage; corneal replacements were required.

A more recent recall was of Baxter infusion pumps – pumps that deliver medication through IVs.Due to computer software errors and battery usage failures, these infusion pumps were not working properly, resulting in delays or interruptions in patients getting the medication, endangering their lives.

There are thousands of devices cleared every year, and most are not recalled.But there is tremendous human cost when these devices fail.  I want to speak briefly about the human cost.

In addition to the above examples, there were many 510(k) defibrillators where the device malfunctioned and the patients died.

There are 510(k) bladder slings and surgical mesh that resulted in permanent pain and incontinence as well as vaginal atrophy for women across the country.

Some people today say that the process works well because thousands of devices are cleared, and most are not recalled.  But are these devices safe?  Are they effective?  Many devices are sold that may not even work, and it is often difficult for doctors or patients to determine how well a device works, because some patients will get better and some will get worse, whatever their treatment.

Post-market studies and regulation is so important and yet is very limited.  No “condition of approval” is allowed.  The 510(k) devices should be the easiest to rescind, since clinical trials are usually not required before they are cleared, but the FDA points out that they don’t have that authority.  This is a ridiculous situation.

Christy Foreman’s presentation spelled out all the fundamental problems with the 510(k) process very well.  Clearly, the focus of the 510(k) process has been on letting companies change devices in the name of innovation, not based on public health standards or problems.  As a result, devices are being sold that are so different from previous “substantially equivalent” devices that the FDA has no idea whether the product is safe or effective, and in many cases these innovative devices are either not as safe as other products on the market, or not as effective.  This costs the medical system (and individuals) billions of dollars each year. Either they buy/use products that don’t work, or they spend a great deal of money on health problems that result from unsafe devices.