Henoch-Schönlein Purpura

Henoch-Schönlein purpura (nonthrombocytopenic purpura) is a vasculitis of unknown etiology affecting mostly children. Usually a characteristic lower extremity purple rash precedes abdominal symptomatology, with some exceptions. Abdominal pain and bleeding in these patients presumably is secondary to intramural bleeding or a serohemorrhagic effusion.
Imaging reveals a predilection for proximal small bowel involvement. With extensive involvement, a small bowel study reveals intramural fluid as fold thickening and thumbprinting. An intramural hematoma occasionally acts as a lead point for an intussusception. Computed tomography identifies segmental small bowel mural thickening, a nonspecific finding.
In children with Henoch-Schönlein purpura, US detects dilated small bowel segments, decreased motility, and eccentric bowel wall thickening.
This is radiology images of the Henoch-Schönlein purpura resulting in bowel wall edema (arrows) and fold infiltration.
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