<prompt> All are features of hypernephroma except:May invade renal veinLower pole involvementMore common in malesCannon ball secondaries are seen  <response>: RENAL CELL CARCINOMA AKA gravitz tumor, hypernephroma, internists tumor, radiologists tumor - More common in males, in 6th and 7th decade - Tumor usually involve upper pole Most common site of distant metastasis are lungs cannon ball deposits and pulsatile osteolytic secondaries in boneliverbrain Characteristic feature of RCC is tendency to invade renal vein 