FINDINGS: The visualized proximal duodenum displays circumferential mural thickening, single wall thickness 7 mm. Outer wall to outer wall diameter is 29 mm.
Remainder of the imaged bowel is normal in appearance.
Small volume of free fluid, as seen on previous ultrasound.
IMPRESSION: 1. Circumferential mural thickening of the proximal duodenum. This likely represents intramural hemorrhage secondary to IgA vasculitis (Henoch-Schonlein purpura), particularly given pre-existing clinical diagnosis of this condition. Differential includes an inflammatory or infectious process, considered less likely.
2. No evidence of intussusception.