Figure 1From: Metachronic malignant transformation of small bowel and rectal endometriosis in the same patientA. Infiltrative endometrioid adenocarcinoma of the ileum (hematoxylin-eosin stain, 100×). B. Cytokeratin 20 immunostaining negative (100×). C. Cytokeratin 7 immunostaining positive (100×). D. Cecum intraparietal benign endometriosis (hematoxylin-eosin stain, 100×).Back to article page