Simultaneous bilateral testicular tumors, one side clinically occult: detection by ultrasonography

The majority of bilateral testicular tumors are discovered sequentially. Some of these second tumors may be present subclinically at the time the initial contralateral tumor is diagnosed and their simultaneous detection with ultrasound screening would obviate the inherent problems of an otherwise sequential bilaterality. We report a case of simultaneous bilateral seminomas in which 1 of the 2 tumors was subclinical and detected with ultrasound. The various problems encountered with these asynchronous second tumors in contrast to those diagnosed simultaneously are discussed.