Friday, November 11, 2011

Getting to the Bottom of It

via PostivelyAware, by Gary Bucher

Gary Bucher, MD, FAAFP is a leading anal dysplasia and anal cancer prevention specialist in the U.S. Dr. Bucher is certified in performing high resolution anoscopy for the evaluation and treatment of anal pre-cancerous lesions. He is the founder and medical director of Anal Dysplasia Clinic MidWest with locations in Chicago and St. Louis, and is involved in clinical trials in the field. 

Gary was one of LifeLube's distinguished speakers at Project CRYSP's last community forum for the year "Get Freaky" hear the podcast here Courtesy of Feast of Fun!

I have witnessed and taken part in the many changes in HIV care over the past 25 years. At the beginning of the epidemic, silence and fear was the name of the game.

It took HIV activists taking control of their health care destiny to force the medical community to treat the disease and the patient.

HIV is now a chronic treatable disease, but it has a whole new set of issues regarding conditions related to prematu cian should feel for any tender areas, thickened lesions, shallow indentations, firm masses, or other abnormalities.

I also ask the patient if they have performed an anal self-exam by using their finger to feel around for any lumps or bumps inside their anus. This can help guide me when I perform the digital anorectal exam.

Anal Pap smears are performed in a similar fashion to cervical Pap smears, with the area being swabbed to collect cells, which are then examined under a microscope.

They can detect abnormal cells (anal dysplasia), but the anal Pap smear may be less likely to correlate with the degree of anal dysplasia that can be seen on a biopsy of an anal lesion revealed by high resolution anoscopy (HRA).

 Because such specificity is lacking, and there haven’t been any evidence-based clinical trials to evaluate anal cancer screening methods in preventing anal cancer, many clinicians feel that anal Pap smears should not be done at this time. However, I agree with other experts in the field who have proposed yearly anal Pap smears for all HIV-positive individuals.

If the anal Pap is normal, continued annual screening is suggested. Experts also recommend anal Pap smears every one to two years for other high-risk groups and if normal, continued screening every two or three years. If any abnormal cells are detected, HRA with biopsy is recommended.

However, these guidelines may be limited by the need to train a greater number of clinicians in performing HRAs and biopsies. It is also important for these screening tests to be administered in a non-hospital setting, to maximize patient compliance with screening and follow-up.

High-risk HPV subtypes, especially 16 and 18, are associated with cervical, anal, penile, vulvar, vaginal, and oral cancers. Cervical cancer is an AIDS-defining malignancy and its incidence has been decreasing with aggressive screening and treatment of pre-cancerous lesions or higher grade cervical dysplasia.

Cervical cancer affected 35-40 per 100,000 women in the general population prior to cervical cancer screening and treatment and has now decreased to about 8-10 per 100,000.

Though most genital and oral cancers are caused by high risk HPV, these cancers are not increasing as fast as anal cancer in HIV-positive individuals and other high-risk groups.

Compared to the more common lung cancer, penile, vaginal, and vulvar cancers are rare—between 0.42 and 1.8 per 100,000. Oral cancer affects an average of six men and 1.76 women per 100,000.

Anal cancer in the general population is still very rare and affects more women than men. The incidence in men is 1.14/100,000 compared to 1.76/100,000 in women.

Individuals at increased risk for developing anal cancer include HIV-positive men and women; HIV-negative men who have sex with men (MSM); women with a history of cervical, vaginal, or vulvar cancer or cervical dysplasia; chronically immunosuppressed organ transplant patients; men and women with a history of anal warts; and people who smoke tobacco.


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