[Primary carcinoid tumor of the kidney associated with cystic malformation of the kidney].

We report a case of primary renal carcinoid tumor associated with kidney malformation. The carcinoid tumor contained cells which stained with anti-chromogranin, anti-serotonin and anti-somatostatin antibodies. The carcinoid tumor was developed on a cystic malformation with transitional epithelium. Immunohistochemical studies revealed positive chromogranin and serotonin cells within the epithelium. The 21 other cases of primary renal carcinoid were reviewed with a particular emphasis on the 2 other cases associated with renal lesions containing endocrine cells. These 3 cases could help to explain the development of primary renal carcinoid tumor.