My cat has 2 lumps under her skin, one on her back, and a large one on her stomach, that have just appeared. Yesturday after I took her to the Vet, I realized that she is also loosing hair along her lower back. The vet said that they recommended surgery to remove the lumps, but said that they could not tell me what it might be, until they are removed. I just wondered what this might be the simptoms of. I am going to take her for a blood test before I let them do surgery on her.