COLON LIPOMA

The diagnosis is easy when you have the surgical specimen.

This was more difficult, but the endoscopy was more clear. The red square indicates submucosal fatty tissue

This is pseudolipomatosis (it is air  trapped in mucosa)  but  it can confuse  with lipoma

HISTOLOGICAL FINDINGS OF LIPOMA
1.- Rounded submucosal mass of mature adipose tissue

Odze RD, Goldblum JR: Surgical Pathology of the GI Tract, Liver, Biliary Tract, and Pancreas, 2nd ed. Elsevier: Philadelfia 2009
Greenson  Diagnostic Gastrointestinal and Liver Pathology ,Lippincott Williams &Wilkins, 2009.