[Antenatal discovery of megacystis-microcolon-intestinal hypoperistalsis syndrome (MMIHS) at 12 weeks gestation].

Megacystis on antenatal scan in female fetuses is rare and has diagnostic implications. We report a case of megacystis-microcolon-intestinal hypoperistalsis syndrome (MMIHS) in a female infant. The antenatal scan revealed abnormalities, but the diagnosis was not established until after delivery. MMIH is a rare autosomal recessive condition which is usually lethal in the first year of life. Prenatal diagnosis is hampered by the lack of specific diagnostic ultrasound findings and the absence of an identified genetic locus.