"Henoch–Schönlein purpura"
"Duodenal haematoma is generally a nonoperative condition. When occurring in isolation, it is managed conservatively with nasogastric decompression, and resolution is typically observed within 1–3 weeks 2,3. During this time total parenteral nutrition and intravenous fluids are required to allow for bowel rest 3."
"Henoch–Schönlein purpura"
"The retroperitoneal portions of the duodenum (distal D1, D2 and D3) are a frequent site of traumatic intramural haematoma, more so than elsewhere along the gastrointestinal tract due to fixed location, lack of a mesentery, and close proximity to the spine 2-3."
"search for other abdominal organ injury in setting of trauma: likely pancreatic, splenic, renal and liver injuries"