Solitary nonparasitic cysts of the liver are rare, especially in children. In only 25 of the 108 cases reported to date1 did the lesion occur in children under 13 years of age. Stoesser and Wangensteen1a in 1929 and Wikle and Charachelb in 1936 reviewed the literature in detail and reported cases of their own. Little has been added to knowledge concerning these cysts since then. Because the 2 children with this rare condition that have come under my observation exhibited some unusual features, I have thought it worth while to report their cases and to comment on the subject. REPORT OF CASES Case 1. —C D., a white girl aged 6 years, of Irish parentage, was admitted to the Children's Memorial Hospital on Oct. 31, 1935 because of a large, flabby abdomen and an abdominal tumor, both of which had been present since birth. When the child