Acute Kidney Injury in Patient With a Purpuric Rash

A 62-year-old white man with past medical history of ulcerative colitis presented with purpuric rash and abdominal pain that started 4 weeks previously. The abdominal pain was associated with nausea, bloating, episodes of diarrhea, and hematochezia. He stopped taking mesalamine prior to symptom onset. A week earlier, he presented to a local hospital where computed tomography abdomen and pelvis demonstrated ...