RESUMEN
Henoch-Schönlein purpura (HSP) is typically seen as a self-limiting disease in children, but can present more severely in adults, especially when there is renal involvement. Management of HSP in adults also remains a controversial topic with very few studies evaluating available therapies. In this case, HSP presenting as a combination of severe gastrointestinal involvement and a rapid decline in renal function in an adult patient directed our therapy. The patient was a 48-year-old Caucasian male with no known past medical history, who presented with a combination of purpuric rash over the lower extremities, severe abdominal pain with upper gastrointestinal bleeding and a rapidly increasing serum creatinine, with hematuria. He initially underwent a skin biopsy, along with investigation for other possible causes, including autoimmune and infectious etiologies, which were negative. He was started on therapy for presumed HSP with intravenous methylprednisolone. The skin biopsy, however, was not conclusive, and the patient had no improvement in his clinical status. He then underwent a kidney biopsy that was consistent with HSP nephritis (immunoglobulin A (IgA) predominant glomerulonephritis with crescents), and esophagogastroduodenoscopy (EGD) that showed mucosal inflammation, ulcerations, and stigmata of bleeding-findings that were consistent with ischemia. Cyclophosphamide was added to the regimen at this time. However, he had worsening abdominal pain, continued gastrointestinal bleeding, now with hematochezia, and also worsening renal function that required dialysis. Plasmapheresis was then initiated on days alternating with dialysis. This resulted in the improvement of his gastrointestinal symptoms, but no recovery was seen of his renal function, and the patient required outpatient dialysis. This case report exhibits the unique presentation of severe gastrointestinal (GI) manifestations and rapid progression to renal failure in an adult patient with partial resolution of his severe manifestation after therapy was escalated as above. There was no established protocol that guided this therapy, which reflects the need for more studies on adult HSP.