Figure 2. Angiocentric glioma, CNS WHO Grade 1.
(A) Smear preparation reveals bipolar cells (arrows) with long processes, resembling pilocytic astrocytoma (Hematoxylin and Eosin, 200x). (B) At low magnification, the tumor shows mostly parallel neoplastic bipolar cells arranged in a distinctive angiocentric pattern, (arrows) (H&E, 100x). (C) The myxoid component is markedly hypocellular but retains the angiocentric configuration (arrows) (H&E, 100x). (D) Tumor cells show diffuse GFAP expression, particularly highlighting the angiocentric pattern (GFAP, polyclonal, Ventana, 200x). (E) Strong D2-40 expression is seen in tumor cells (arrows) (clone D2-4, DakoCytomation, 400x). (F) EMA shows moderate cytoplasmic staining, with perinuclear accentuation noted in some cells (arrows) (EMA, clone E29, Dako, 400x).
Image Source: Almubarak et al. [27] shared under the Creative Commons CC BY-NC license
GFAP: Glial fibrillary acidic protein; EMA: Epithelial membrane antigen
