Lupus Enteritis and Cystitis

The patient was a 41-year-old woman with a 1-year history of systemic lupus erythematosus based on her discoid lupus erythematosus, photosensitivity, and her laboratory test findings that showed lymphopenia, low complement (C3, 38 mg/dL; C4, 4 mg/dL), and the presence of antinuclear antibody (1:320 speckled pattern) and antiphospholipid antibodies (anticardiolipin antibodies, anti-β2-glycoprotein I antibody, and lupus anticoagulant). She presented to the emergency room with a two-day history of vomiting and diarrhea. Sagittal-view of contrast-enhanced abdominal computed tomography (CT) showed bowel-wall thickening with fatty