Figure 2

Tumors with fibromuscular stroma; whole-slide images from http://cancer.digitalslidearchive.net/: (a, b) TCEB1 mutant renal cell carcinoma with fibromuscular bands traversing the tumor, composed of cells with clear cytoplasm. (c) A non-TCEB1 mutant tumor with fibromuscular stroma, showing small vein invasion (d).