[anonymously]

http://skeptvet.com/Blog/?s=lipoma
Excerpt: “Treating Canine Lipomas”
“Another article in this issue addresses the treatment of a common benign tumor called a lipoma. These are aggregations of fat which typically occur in middle-aged and older dogs. The exact cause is not known. They are more common in certain breeds and possibly in overweight dogs. Research in humans suggests possible genetic risk factors, but the definitive cause is not known. This, of course, provides an open field for rampant speculation of how to treat and prevent these benign tumors”.

PS: Hope this helps, I find the site mentioned to be very informative and helpful, plus, they are not selling anything!