system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
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 –
assistant
The correct answer is  Clinical manifestations of neuroblastoma 

Because neuroblastoma arises from neural crest derivatives of sympathetic nervous system, it produces catecholamines.
So, it may cause clinical feature due to : --> 1. Primary tumor          2. Metastais          3. Catecholamine secretion