INFO/WWW: The typical patient with hypernephroma (2) is male and 40-60 years old. The tumor usually invades the inferior vena cava and the renal veins. It may occur tumor thrombosis. Hypernephroma spreads to the nearby tissues, the bone, liver and lung. Clinical features are haematuria, loin pain and abdominal mass, which may be partly cystic and is usually of increased vascularity. A varicocele may be caused by tumor extention obstructing the testicular vein. Differential diagnosis