Urological manifestations of sacrococcygeal teratoma.

A review was done of 29 patients diagnosed with sacrococcygeal teratoma between 1978 and 1991. Urological disorders included total urinary retention (6 patients), hydronephrosis (6), hydrocele (4) and undescended testis (1). Ultrasonography and voiding cystourethrography were performed on the 6 patients in total urinary retention. These studies revealed cystic retrorectal lesions frequently with intralesional calcifications, and anterior and superior displacement of the bladder. Bladder wall trabeculation occurred in 2 of these 6 patients, and 4 had moderate or severe hydronephrosis. Upper urinary tract dilatation was found in 2 patients not in total retention. Hydronephrosis appeared to be related to poor bladder emptying and presumably high intravesical pressures, since each case resolved spontaneously after tumor resection. No primary upper tract anomalies were identified.