[Spontaneous remission of congenital liver cysts]

A six-weeks old infant presented with vomiting, malnutrition, pneumonia and signs of biliary obstruction. The liver was enlarged; ultrasonography showed three large cysts in the right lobe. The cysts were thought to be congenital. Before we could differentiate them from other causes they disappeared spontaneously. To our knowledge, spontaneous regression of congenital cysts of the liver has not been reported previously.