Pathology of rhabdoid glioblastoma. (A) A representative H&E picture shows non-cohesive rhabdoid cells with eccentrically located pleomorphic nuclei and eosinophilic globular cytoplasm (H&E, original magnification × 200). (B) GFAP is robustly positive in some, but not all, tumor cells (GFAP immunostaining, original magnification × 200). (C) EMA is strongly positive in a cytoplasmic membrane pattern in almost all tumor cells (EMA immunohistochemistry, original magnification × 200). (D) Cyclin D1 (CCND1) staining is strongly positive in the nuclei of the tumor cells (cyclin D1 immunohistochemistry, original magnification × 200).