Figure 3From: Urethral metastasis from a sigmoid colon carcinoma: a quite rare case report and review of the literature Immunohistochemical staining of urethral tumor using an anticytokeratin antibody, (a) CK20 and (b) CK7 (original magnification, ×20), and using an antibody against the intestinal epithelia-specific nuclear transcription factor, (c) CDX2 (original magnification, ×20). The immunohistochemical phenotype showed CK20+/CK7-/CDX2 +.Back to article page