541431.fig.002a
(a)
541431.fig.002b
(b)
541431.fig.002c
(c)
541431.fig.002d
(d)
Figure 2: Histopathological and immunohistochemical (GFAP in(b), S-100 in (c)and KI-67 in (d)) features of the lesion. Hematoxylin and eosin stain (HE—(a)) showing perivascular pseudorosettes (anuclear zones formed by radially arranged tumor cell processes surrounding central blood vessels).