BACKGROUND, The authors examined the clinical course of patients with
bilateral testicular tumors to determine whether the outcome after tre
atment was different from patients, with unilateral tumors. METHODS. U
sing a computerized data base of 2088 patients with testicular carcino
ma at Indiana University, 21 patients (1%) were identified with bilate
ral testicular carcinoma. A retrospective review of hospital and clini
c charts was performed. Sixteen patients with metachronous and 5 patie
nts with synchronous testicular tumors were identified. RESULTS. Treat
ment was based on clinical stage and was similar to therapy given for
unilateral disease. The mean age at presentation of the first testicul
ar tumor was 28.4 years (range, 16-47 years). Approximately 50% of the
second primary tumors presented > 5 yea.rs after the contralateral tu
mor. At a mean follow-up of 49.9 months (range, 1-276 months), 18 pati
ents were without evidence of disease, 2 were alive with disease; and
1 patient had died of disease. CONCLUSIONS. The treatment of patients
with bilateral germ cell tumors is based on the pathology and clinical
stage and should not be different from the traditional management of
unilateral testicular carcinoma. Patients with unilateral testicular c
arcinoma should be informed of the necessity of long term follow-up be
cause contralateral testicular carcinoma may occur as long as 25 years
later. Cancel 1998; 83:547-52, (C) 1998 American Cancer Society.