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Henoch-Schonlein purpura (HSP) is a multi-system autoimmune disease that is relatively common in pediatric patients. HSP usually manifests as palpable purpura, arthralgia, abdominal pain, and acute kidney injury. Here, we present a case of an adult male with hematemesis as the initial presenting symptom of HSP.  A previously healthy, 18-year-old Caucasian male presented with a one-day history of hematemesis associated with abdominal pain and non-bloody diarrhea. He also reported bilateral knee and ankle arthralgias with a painless skin rash on both lower extremities. Physical exam was positive for palpable, purpuric, non-blanchable skin rash involving bilateral lower extremities. Notable labs on admission included a white cell count of 10.8 x 10 9 /L and C-reactive protein of 4.8 mg/L. Upper endoscopy showed non-bleeding erosive gastropathy and duodenal erosions. Skin biopsy of the left leg showed immunoglobulin A (IgA) deposition within the walls of the superficial dermal vessels. The patient was started on intravenous methylprednisolone 500 mg daily followed by a steroid taper. Due to incomplete clinical response to steroids, mycophenolate mofetil 1000 mg twice daily was added and maintained for three months. His symptoms improved significantly, and he no longer complained of abdominal pain or diarrhea.  Gastrointestinal manifestations are common in HSP patients. However, the diagnosis will be challenging when these symptoms precede other classical manifestations of HSP. History and physical exam are key components in accurately diagnosing HSP; nevertheless, skin biopsy remains the gold standard to confirm the diagnosis.

Henoch-Schonlein Purpura Presenting as Upper Gastrointestinal Bleed in an Adult Patient