Figure 3.
Histopathology of the lesion resected during the craniotomy of a 2-year-old female. (A) Hematoxylin and eosin staining indicates a tumor of moderate cellularity with vascular proliferation, as indicated by the arrow (magnification, ×400). Immunohistochemistry demonstrating neoplastic cells exhibiting strong, diffuse immunoreactivity for (B) CD99 and (C) MAP2, immunoreactivity for (D) nestin and (E) vimentin and a MIB-1 (Ki-67) labeling index (LI)of 20% (magnification, ×200). MAP2, microtubule-associated protein 2.