The “Endothelialized Muscularis Mucosae”: A Case Report Describing a Large Cavernous Hemangioma at the Terminal Ileum and a New Histologic Clue for Preoperative Diagnosis from Endoscopic Biopsy

Figure 5

Histologic examination of the surgical specimen showed dilated vascular spaces filled with blood and lined by a layer of flat, benign-appearing endothelial cells. The wall of the vascular channels was composed of smooth muscle and fibrous tissue (histology of surgical specimen).