An 10-year-old boy is brought to the physician by his mother for a 4-day history of abdominal pain, fever, and swelling of the face and eyelids. Past medical history is unremarkable. He recently recovered from an upper respiratory tract viral illness. Abdominal examination shows diffuse mild tenderness to palpation and a fluid wave. Which of the following is the most likely etiology for this patient’s abdominal presentation?
Hemolytic uremic syndrome
Henoch-Schönlein purpura
Liver failure
Nephrotic syndrome
Norwalk virus
