yeah, I will echo what others are saying, the term "pre-cancerous" used in this way (why do doctors do this???) really just means abnormal cellular activity. I myself had a "precancerous" condition a few years back (a common one actually for many women) and had minor surgery and so far so good! You gotta keep monitoring it (in my case regular PAP smears which women are supposed to get anyway) but sometimes western medicine nips things in the bud...

I also had a friend with vocal nodes which can in some instances turn cancerous but the thickening does affect the singing voice. Stevie Nikcs, Patti Lupone and Madonna all had them at one point; Stevie nearly lost her voice entirely. This is more common in women than men. My best friend from high school, a talented classically-trained singer, lost her singing voice due to vocal overuse (raising two kids on her own) and underuse of her singing voice. She eventually got it back; not the same sweet purity of before but then that would have changed with age anyway...

Vocal rest (complete and utter rest) is very important to rest the cords and allow them to heal. Even whispering is harmful (sometimes more than singing). I am surprised no docs have suggested this (or have they?)

peg