Fat Necrosis.

Fat Necrosis.
Necrosis of the mesenteric fat can be extensive. Saponification of the fat renders it firm (like a bar of soap). It may be mistaken for a fetus. In this illustration the fat encroaches on the lumen of the intestines which may lead to obstruction. It has been associated with heavily fertilized fescue pastures.

Drost M (1971)