Fig. 4
From: Angiomatous pleomorphic xanthoastrocytoma: a case report and literature review
Immunohistochemical and specific staining, and BRAFV600E mutation analysis. a Silver staining shows reticulin fibers encircling the blood vessels, but they are hardly present among tumor cells. b The EGBs stain red with PAS (Fig. 4b). c–f The tumor cells are diffusely positive for GFAP, S100, and olig2, but negative for EMA. g, h The tumor cells are negative but the capillaries within the tumor are positive for CD34. i The tumor cells are negative for IDH1. j Approximately 50 % of the tumor cell nuclei stain positively for p53. k The Ki-67 labeling index is approximately 2 %. l The tumor was negative for a BRAFV600E mutation. In each figure part, the corresponding histological features are indicated by arrows