Two non-related female neonates with the megacystis-microcolon-intesti
nal hypoperistalsis syndrome are described. One presented with a famil
y history of a similar condition. In one child no intestinal peristals
is was observed, while in the other decreased peristalsis with occasio
nal rectal evacuation occurred. Both had fatal outcomes. These two cas
es demonstrate the wide variation in the clinical course of this rare
and fatal syndrome.