... of a small thumb and also as wide as one.On top of the lump is a patch of hairs that are stuck together and the roots of the hairs on the edges seem to be pulling out and there is flesh showing. Yesterday she had the same thing (with the hairs) on the side of the lump, but it came out. She hates it when i touch it but in general seems to be acting normal. She is an out door cat but comes in at night. She recently got into a big fight with my other cat so i am not sure if it is an injury, but if it was an injury then she wouldnt have a lump on the inside of her stomach. Please help give me suggestions for treatment or what it is. I am hoping it is not cancer. Please help