<prompt> Which one of the following is not a feature of clear cell carcinoma of the kidney?Bony secondariesChildhood tumourHaematuriaRenal vein invasion  <response>: 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 lossmalaise It is not a childhood tumor. 