Fig. 7From: Low-grade myofibroblastic sarcoma arising in fibroadenoma of the breast-A case report–Intratumoral small vessels showing the transition to the tumor cells. a A peripheral venule-like vessel reveals intraluminally medial cell proliferation (arrows) (H&E stain, ×40). b Another tumor vessel is irregularly thickened by medial cell proliferation (curved arrows) of pericytic smooth muscle cells, which merge with the adjacent tumor cells (H&E stain, ×100)Back to article page