Fig. 5

Histopathological findings (microscopic). The tumor shows an infiltrative growth pattern (a) and vascular invasion is also noted (b). The tumor is composed of polygonal or oval-shaped cells arranged around blood vessels (c), spindle cells arranged in fascicles (d), and round epithelioid cells with clear cytoplasm (e). Multinucleated giant cells are also noted (f, highlighted with yellow arrows). Mitotic figure was easily recognized, including abnormal mitosis (f, highlighted with a red arrow)