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': 'Which one of the following is not a feature of clear cell carcinoma of the kidney? \nSelect and explain. \nA. Bony secondaries, B. Childhood tumour, C. Haematuria, D. Renal vein invasion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: * Clear cell carcinoma arises from Proximal Convoluted Tubule * Most common ,associated with VHL gene mutation, invade the renal vein& bony secondaries. * Clinical features : -Hematuria -Palpable mass -Costoveebral pain -Fever/ weight loss/malaise * It is not a childhood tumor.', 'role': 'assistant'}]