Seminoma of testis: the value of aggressive therapy, and risk of late bilateral involvement.

The results of aggressive therapy for seminoma of the testis have improved dramatically during the past decade. A patient who eight months after orchidectomy had a pulmonary metastasis excised and who nine years later developed a seminoma in the contralateral testis is described. One consequence of the much longer survival time now attainable is that an increasing number of cases with metachronous testicular seminomas may be encountered in the future.