Bilateral testicular tumors: a report of nine cases with long-term follow-up.

Background: The incidence and clinical features of bilateral germ cell testicular tumor (GCTT) in the Japanese population are not fully characterized. We examined the incidence, clinical features, management and outcome, sexual status, hormonal environment, implication of androgen replacement, and human leukocyte antigen (HLA) typing of bilateral GCTT.

Methods: We treated nine consecutive patients with bilateral GCTT from 1980 through to 1999, and reviewed their hospital and clinic charts.