I’ve never heard of anal cancer. I thought you made that up.
No. Sadly, I believe that she is going to die very soon.
It sounds like colon cancer, but melanoma sometimes shows up first “where the sun doesn’t shine.” Nasty melanomas on the rectal area or anus are too common. Given all the exposure to sun that she had, Farrah would probably be a good (poor word, under the circumstances) candidate for melanoma.
Sorry to hear that Ms. Fawcett is having to fight for her life. Prayers up!