Retroperitoneal abscess after normal delivery. A report of two cases.

Background: Retroperitoneal abscess is a rare complication of normal labor and delivery, and no apparent etiology is evident.

Cases: We report on two patient who presented with back and leg pain soon after normal deliveries. While the condition was initially clinically misdiagnosed, ultrasonography and computed tomography demonstrated retroperitoneal collections and aided in guided percutaneous drainage.

Chilaiditi's syndrome in an infant: bowel loops mimicking mass lesions on sonography.

We report the case of a 6-month-old boy with Chilaiditi's syndrome presenting with tender hepatomegaly and abdominal pain. On sonography the interposed bowel loops mimicked a posterior hepatic or retroperitoneal mass. Although the majority of these cases may be radiological curiosities, patients can present with a variety of abdominal signs and symptoms.