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 7

Upon immunohistochemical staining of the original endoscopic biopsy specimen, this second layer of smooth muscle/fibrous tissue was also lined on the antiluminal side by a layer of flat endothelial cells, highlighted by the endothelial marker CD34 (immunofluorescence staining of endoscopic biopsy).