Fig. 6From: Retrograde venous invasion in renal cell carcinoma: a gross diagnosis Case 6. A 65-year-old male patient with clear cell carcinoma. In the bisected kidney, small yellow nodules between renal pyramids are seen in mid-pole (A and B). All photos show invasion of sinus veins. In C, yellow nodules within renal sinus indicate vein invasionBack to article page