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Anal cancer is on the rise, especially in women. Should they be screened?

Currently, there are no accepted screening guidelines. The average woman has a tiny lifetime risk of anal cancer (two in 100,000), so figuring out which women to check, and the best way to do it, is full of dilemmas.

Actress Marcia Cross has been in remission from anal cancer for about a year. She's pictured at Stand Up To Cancer 2016 held at Walt Disney Concert Hall in Los Angeles, California.
Actress Marcia Cross has been in remission from anal cancer for about a year. She's pictured at Stand Up To Cancer 2016 held at Walt Disney Concert Hall in Los Angeles, California.Read moreSipa via AP Images