Testicular carcinoma in situ and nonpalpable seminoma eight years after contralateral teratocarcinoma.

A thirty-five-year-old man had invasive seminoma and extensive carcinoma in situ in his remaining testicle eight years after orchiectomy and lymphadenectomy for Stage I teratocarcinoma. Beyond orchiectomy and hormone replacement, suitable treatment for such second neoplasms, which occur in at least 1 percent of patients, is not clear. More work also is needed to determine appropriate follow-up after treatment of the first cancer now that long-term survival of testicular cancer is the rule.