Fig. 2.
Microscopic view of sections of surgical specimen (H&E, 400×) through histopathological (a) and immunohistochemical (b, c) examinations. In particular, (a) shows proliferation of spindled-shaped cells with ovoid nuclei, arranged in interlacing bundles while (b) and (c) show diffused positivity for smooth muscle actin and vimentin, respectively