Leiomyomatous renal hamartoma in an adult.

In 1967, Bolande coined the term, congenital mesoblastic nephroma, in relation to a rare benign kidney tumor which is mainly found in infancy and that can be misdiagnosed clinically as a Wilm's tumor. It has been called renal fetal hamartoma, leiomyomatous hamartoma and renal leiomyoma. Four cases have been described in adults previously and here we report a new case.