[Ultrasonographic antenatal detection of obstructed bladder (author's transl)].

The antenatal diagnosis of bladder obstruction may be possible by ultrasonography of the mother. We report herein four cases of prenatally detected megacystis: two were Prune Belly syndromes, one of which was aborted. The two others were female infants, one had a megacystis-microcolon-hypoperistalsis syndrome, in the other hypoperistalsis was present along with megacystis. Transuterine-transfetal bladder taps were used to relieve bladder pressure in utero.