This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pediatrics
[{'content': 'A 10 year old male child presents with purpuric rashes on the lower extremities, hematuria, abdominal pain, and ahritis but has no history of fever. What is the likely diagnosis ? \nSelect and explain. \nA. Meningococcal meningitis, B. Henoch-Schonlein purpura, C. Idiopathic thrombocytopenic purpura, D. Hemolytic uremic syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Symptoms of Henoch-Schonlein Purpura : The classic symptoms of HSP are and swelling, , including blood in urine. Before these symptoms begin, patients may have two to three weeks of fever, Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]