title: Fluid-filled structures simulating solid tumors at ultrasonography--a report on five cases.
abstract: Five cases with echogenic intraabdominal or retroperitoneal cystic structures are described. Some suggestions as to the differentiation of such findings from solid tumors are given.
mesh_terms: D002648:Child; D002675:Child, Preschool; D012809:Colon, Sigmoid; D003560:Cysts / Q000151:congenital / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D005766:Gastrointestinal Contents; D006470:Hemorrhage / Q000175:diagnosis*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009369:Neoplasms / Q000175:diagnosis*; D014463:Ultrasonography; D014513:Ureter / Q000002:abnormalities*