Urethral tumor showed moderately differentiated adenocarcinoma consistent with sigmoid colon cancer (original magnification, ×20). Urethral metastasis from a sigmoid colon carcinoma: a quite rare case report and review of the literature. Kazama S, Kitayama J, Sunami E, Niimi A, Nomiya A, Homma Y, Watanabe T - BMC surgery (2014). Not Altered. CC.