Successful treatment of a bulky seminoma in an abdominal undescended testis: a case report.

An undescended testis is a major risk factor for the development of testicular malignancy. Herein we report the case of a 40-year-old man with a bulky seminoma arising in an uncorrected abdominal undescended testis. The definitive diagnosis was established by results of sonoguided biopsy and tumor marker studies. The patient was successfully treated with initial cisplatin and etoposide combination chemotherapy followed by resection of the residual tumor. The optimal diagnosis and treatment of this rare disease is discussed.