[Gynecomastia and Leydig cell tumor, clinically occult]. / Ginecomastía y tumor de células de Leydig, clínicamente oculto.

OBJECTIVES: An uncommon case of clinically occult Leydig cell tumor of the testis is described. The literature is reviewed with special reference to the difficulty encountered in making the diagnosis. METHODS/RESULTS: The clinical data of a patient with occult Leydig cell tumor of the testis, whose only remarkable feature was a long history of gynecomastia, are presented. CONCLUSIONS: A hormonal study and scrotal ultrasound evaluation are essential in the diagnosis of this tumor type and should be performed even in the absence of testicular anomalies on palpation.