[Seminoma on ectopic testis associated with renal agenesis].

Tumors developing on ectopic testes, usually seminomas, are a rare occurrence, but when they do arise they are frequently associated with renal agenesis. Clinical manifestations vary, the presenting sign being generally an abdominal mass. Among the numerous exploratory techniques available the current examination of choice is computed tomography. The precise site of the lesion can be determined employing lower irradiation doses than those delivered during invasive methods.