Collecting duct carcinoma (CDC) is a rare renal malignancy accounting for about 0.4-2.6% of cases. We report a case of CDC in a 61-year-old woman previously operated on for pulmonary adenocarcinoma. On histological examination and immunohistochemical research diagnosis of asynchronous primary bronchial carcinoma and renal CDC was made. The authors review the available literature on CDC and differential diagnosis of metastatic versus primary renal carcinomas.