about 20 years ago I had a biopsy of the tongue.The results said that it had characteristics of hairy leukoplakia.The dentist that I see now sent me to an oral surgeon who wants to biopsy it. Is it  possible that it could be cancerous when I have had it so long? It just looks like a white area on either side. I have never smoked and with the exception of ulcerative colitis I am in pretty good health. I am 45 years old. Thankyou for your time.
With your query, hairy leukoplakia is a precancerous lesion and usually associated with autoimmune deficiency syn Chat Doctor. In your scenario exact cause is not known. Basically this is a viral infection caused by ABV i.e. Epstein Barr virus and the treatment is high doses of anti-viral