Figure 6From: A large thigh mass: a blood clot or a rare skeletal muscle metastasis from renal cell carcinoma Light microscopy 40X showing malignant cells with clear cytoplasm along with distinct cell membranes and prominent nucleoli. It was positive for cytokeratin, RCC, p-NRA and negative for CK7, CK20, S-100, MART-1, and PAS.Back to article page