A 6-year-old boy presents with a complaint of pain in the left leg and knee for one week. He has experienced no recent trauma, and his past medical history is unremarkable. His physical examination reveals a temperature of 100°F (37.8°C) orally with no lower extremity swelling, misalignment, or weakness.
He has tenderness over the right knee, hepatosplenomegaly, and petechiae on his cheeks and chest. What is the likely diagnosis? (Answer is posted in the comment section below!) *This case is from the Editorial team of Docplexus and is meant for educative purposes only.
