Leiomyosarcoma of Colon

Leiomyosarcoma of Colon •Colon has been opened disclosing a tumor which has pushed up the overlying mucosa in button-like fashion •The underlying tumor arose in the muscularis propria •The central ulcer(black arrow) is tumor necrosis of the overlying mucosa •The raised tissue(green arrow) around the ulcer is normal mucosa with the same smooth tan surface as the rest of the intact mucosa (Description By:Melinda Sanders,M.D. ) (Image Contrib. by:Melinda Sanders,M.D. UCHC )