Hello, I was hoping to get some advice on what to do with my cat. About one month ago, I noticed a bump on her back left hip. I took her to the vet, and the vet was unsure of what could be causing the bump. He suggested that we watch the bump for a few weeks to see if it grows larger or gets smaller. It has not seemed to change at all in almost a month. My cat shows no other signs or symptoms, eats, sleeps, and plays regularly and everything. My vet is concerned that the bump has not decreased in size and has advised me that I should get the bump removed. He thinks that the accuracy of a needle aspiration biopsy is low, and that it would be better to just remove the bump through surgery and then test it. Do you think this is the right decision? I am jumping the gun by putting my cat through surgery without knowing what is causing the bump? Or should I go through with the needle aspiration first in hopes of it being non-cancerous, and thus saving my kitty the stress of having surgery if it is not needed? Are needle aspiration biospies accurate?