No abstract

An unusual case of omental cyst is described. The child initially presented with a unilocular intraperitoneal fluid collection on CT. After paracentesis, CT showed freely layering peritoneal fluid, with eventual complete resolution of fluid. CT eight months later demonstrated re-appearance of a multi-septated cystic mass. At surgery, an omental cyst was found.

It is well known that Down syndrome (DS) affects multiple organ systems, including cardiovascular, gastrointestinal, hematological, and musculoskeletal. Involvement of the lungs by a characteristic form of subpleural cystic disease is well described in the pathology literature. The imaging characteristics of changes caused by this disease have not been previously described in detail in the radiology literature, possibly because they are not well appreciated on plain chest radiographs. We present a child with DS in whom extensive cystic lung disease was discovered incidentally at CT, and review the current literature regarding the pathogenesis of cystic pulmonary abnormalities in children with DS.

Hemoperitoneum in the newborn is an uncommon event, occurring most often in the setting of traumatic delivery. Hemoperitoneum resulting from antenatal hemorrhage into an abdominal mass is rare. We present a case of neonatal hemoperitoneum secondary to antenatal hemorrhage into a retroperitoneal lymphangioma. The differential diagnosis of neonatal hemoperitoneum is discussed.