Rectal angiolipoma diagnosed after surgical resection: A case report

Figure 1 Double-contrast barium enema revealing a 20 mm × 15 mm sessile lesion in the periproctic area (arrows).

Figure 2 Colonoscopy disclosing a sessile lesion with a smooth surface.

Figure 3 Enhanced CT of the lower abdomen demonstrating a fat-containing and slightly enhanced mass at a slice level corresponding to the right side of the lower rectum (arrow).

Figure 4 The tumor composed of a mixture of fat cells, proliferated blood vessels, spindle cells and immature mesenchymal cells (A), smooth muscle of a blood vessel demonstrating staining for alpha-smooth muscle actin but not for spindle cells (B), no tumor cells but only a few histiocytes displaying staining for c-kit (C), and no cells showing positive staining for HBM-45 (D).