Fig. 2. Illustrative histopathology (hematoxylin and eosin) and immunohistochemical images of the resected astroblastoma specimen. A and B: Pseudo-papillary configuration at low magnification (×10). The arrow is pointing towards central blood vessel. C and D: arrow marking vascular hyalinization which is a conspicuous feature of astroblastomas and ranges from mild to severe (×20). E and F: tumor cells arranged in perivascular pseudo-rosette like fashion at higher magnification (×40). Arrow pointing towards central blood vessel wall, G: Ribbon like appearance of astroblastic rosettes on tangential section. It shows classic morphology of tumor displaying columnar to elongated tumor cells with tapering cytoplasmic process pointed by arrow at higher magnification (×40). H: Low proliferative index on Ki-67 (×10). I: glial fibrillary acidic protein immunostain positivity (×20).
	Brain Tumor Res Treat. 2017 Oct;5(2):120-126. https://doi.org/10.14791/btrt.2017.5.2.120
	Copyright © 2017 The Korean Brain Tumor Society, The Korean Society for Neuro-Oncology, and The Korean Society for Pediatric Neuro-Oncology