[Bilateral ectopic ureteroceles: a case report].

The twelfth case of bilateral ectopic ureteroceles in Japan is reported. A two-month-old girl was referred to our clinic because of urinary tract infection. Two large intravesical cystic lesions communicating to the dilated upper urinary tracts, which were compatible with bilateral ectopic ureteroceles were detected. Histological findings of the upper moieties of the duplex kidney showed dysplasia on the left side, and immaturity on the right side. Left heminephrectomy was performed, and a pyeloureterostomy was applied on the right side after placement of nephrostomy for 6 months. The ureteroceles collapsed satisfactorily to void smoothly. The patient has not been in trouble for more than thirty months postoperatively. Indications for preservation of the upper segment and ureterocelectomy in small infants are discussed.