Renal Tumors
This gross photograph shows the cut surface of a kidney which has been longitudinally bisected. There is a large renal cell carcinoma in the upper pole with a typical variegated appearance with bright yellow areas, areas of hemorrhage, and tan and white areas. The bright yellow color is related to the lipid content in these tumors.
The typical "clear cell" appearance of many renal cell carcinomas is illustrated in this photomicrograph. The malignant cells have abundant clear or empty appearing cytoplasm, and the delicate lobular growth pattern is a result of the numerous capillaries between clusters of cancer cells.