Figure 3From: Rectosigmoid adenocarcinoma revealed by metastatic anal fistula. The visible part of the iceberg: a report of two cases with literature reviewHistology of the perineal fistula. a) Glandular proliferation (circle) surmounted by a squamous epithelium (arrow). b) Adenocarcinoma with necrosis. c) Immunohistochemical staining immunoreactivity with anti-CK20.Back to article page