My cat has been having ear issues. At first we thought it was a polyp it turned out to be a mass that was mostly removed at Michigan State Veterinarian clinic. Later when we received the biopsy we were informed it was cancer. We were told this cancer was non aggressive or invasive as of now and has low rates of being invasive. My question is will it usually become aggressive? My other question is if it does not become an aggressive cancer and it stays in that one area will it affect my cat’s life span. She is about 9 years old. After her surgery they removed most of her ear drum and sometimes her ear twitches is this because removal of the ear drum or cancer.