This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal carcinoma, Subject name: Pathology
[{'content': "From which of the following renal oncocytoma arises ? \nSelect and explain. \nA. Loop of henle, B. Collecting duct, C. Proximal tubule, D. Bowman's capsule", 'role': 'user'}, {'content': 'Answer: B \nExplanation: RENAL ONCOCYTOMA: Benign epithelial neoplasm Arises from the intercalated cells of collecting ducts. Associated with genetic changes : loss of chromosomes 1 and Y Gross appearance- tumors are tan colored ,relatively homogeneous, and well encapsulated with central stellate scar Microscopically- characterized by a plethora of mitochondria which gives them tan color and granular eosinophilic cytoplasm.', 'role': 'assistant'}]