Recurrent colocolic intussusception in a child with hereditary angioneurotic edema: reduction by air enema.

The authors discuss a case of hereditary angioneurotic edema in a child presenting with recurrent episodes of colocolic intussusception, each successfully reduced by air enema. Although additional manifestations of vasogenic edema are potential risks of the procedure, these were not encountered.

Slipped capital femoral epiphysis: a physeal lesion diagnosed by MRI, with radiographic and CT correlation.

Objective: To define and compare early lesions associated with slipped capital femoral epiphysis (SCFE) on magnetic resonance imaging (MRI), computed tomography (CT) and radiography.

Design And Patients: Thirteen patients with 15 symptomatic hips due to SCFE underwent radiography and MRI; CT was performed in 12 patients. SCFE was graded on radiographs, head/neck angles and qualitative changes were evaluated on CT, and morphologic/signal abnormalities were determined on MRI.

Solitary (unicameral) bone cyst. The fallen fragment sign revisited.

The fallen fragment sign is a prominent radiologic feature in a minority of cases of unicameral bone cyst (20% in this series). This sign is always associated with pathologic fracture. Intramedullary fracture fragments may be single or multiple and may or may not be entirely dislodged from overlying periosteum.