The infrequent association of synchronous renal and colonic malignancies.

The coexistence of both kid- ney and colon primary malignancies is a rare condition. We report the case of a 75-year-old woman who presented with bilateral pul- monary nodules at chest X-ray and stratigra- phy. Total-body CT scan showed multiple, ap- parently metastatic, bilateral pulmonary le- sions, a diffusely dysomogeneous neoforma- tion in the lower pole of the right kidney and a gross neoformation in the ascending colon. A right nephrectomy and a right hemicolectomy were performed and histology showed two pri- mary neoplasms: clear cell renal carcinoma and undifferentiated adenocarcinoma of the colon.