Colonic Carcinoma Invading the Kidney: Case Reports

Renal metastasis from primary colon cancer is very rare. By 2011, 11 cases were reported in the medical literature of colonic adenocacinoma metastatic to the kidney. In a 51-year-old female in USA, the report was of “extraluminal colonic adenocarcinoma which directly invaded into the kidney.” Therefore, the author presents 2 cases of colon cancer spreading to the kidney from the Igbo ethnic group in Nigeria. A clarification of the difference between direct extension and metastasis is deemed to be essential. Keywords: Colon; Cancer; Metastasis; Kidney; Igbos; Nigeria