Fig. 3From: Anal fistula metastasis of rectal cancer after neoadjuvant therapy: a case reportPathological findings of the anal fistula. Pathological findings show an adenocarcinoma morphologically similar to rectal cancer and tumor cells infiltrating the proximal margin (A). On immunohistochemistry, the sample is CDX-2 positive (B), CK20-positive (C), CK7-negative (D), and GCDFP-15-negative (E)Back to article page