Figure 2From: Metachronic malignant transformation of small bowel and rectal endometriosis in the same patientA. Rectal endometrioid adenocarcinoma with adjacent focus of endometriosis (hematoxylin-eosin stain, 20×). B. Rectal endometrioid adenocarcinoma (hematoxylin-eosin stain, 100×). C. Cytokeratin 20 immunostaining negative (100×). D. Cytokeratin 7 immunostaining positive (100×).Back to article page