Fig. 3

Histopathological features of the three cases of our cohort. Each line represents one patient (cases #1 to #3 from top to bottom). Cavernous-type pattern composed of dilated vascular channels with variable thickening of the walls (A, D, G, HPS, magnification × 100) with some perivascular concentric arrangement of myoid cells (insert magnification × 400). The vascular cavities were lined by endothelial cells stained by CD34 (B, E, H, magnification × 100). In the walls of vascular structure, the tumor cells were diffusely immunoreactive for h-caldesmon (C, F and I, magnification × 100). Black scale bars represent 250 μm (A–I) and 50 µm (insert). HPS Hematoxylin Phloxin Saffron