Fig. 3From: Renal cell carcinoma on imaging unveiled as a primary Ewing’s sarcomaon immunohistochemistry the tumor cells are immuno-negative for CK A & CK7 B. Few entrapped renal tubules (on right side) show expression with both markers acting as internal control. AMACR C expression is negative in tumor cells. Strong and diffuse immune-expression is seen with CD99 D & NKX2.2 EBack to article page