This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': "A 1-year-old child presented with a swelling in the left flank with episodes of flushing, diarrhea, sweating and bone pain. The diagnosis is - \nSelect and explain. \nA. Neuroblastoma, B. Wilm's tumor, C. Medulloblastoma, D. Pheochromocytoma", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Neuroblastoma Clinical manifestations of neuroblastoma o Because neuroblastoma arises from neural crest derivatives of sympathetic nervous system, it produces catecholamines. o So, it may cause clinical feature due to : 1. Primary tumor 2. Metastais 3. Catecholamine secretion", 'role': 'assistant'}]