Figure 9
From: Renal veins and venous extension in clear cell renal cell carcinoma
This primary tumor is separated from the sinus by a layer of uninvolved cortex. Tumor can be seen extending into the dilated vein from within the cortical primary. There is a separate tiny nodule of tumor within a sinus vein (arrow). This patient had a biopsy-proven pulmonary metastasis. Tumor (IVT) can be seen extending into the dilated vein (V) from the cortical primary.
