Grog
I had a fatty tumor that the Dr. called a lipoma. He says that they normally appear in the folds of the skin.
My was between my leg and but cheek. It was about the size of a quarter thick and fatty. I had i removed and then i grew back about 5 years later. I had it removed again and it hasn't came back. The area is still a little fatty.
Trakar
http://www.thedoctorsdoctor.com/diseases/lipoma.htm