Immunohistochemical analysis demonstrating Ki-67, p-AKT (Ser473), p-4EBP1, and pS6K expression in xenograft generating oligodendroglial tumors and corresponding xenografts (YMG23 and YMG23sc1 (A), YMG5 and YMG5sc1 (B), and YMG137 and MGG137sc1 (C)), and oligodendroglial tumors that did not generate xenografts (YMG28 (D), YMG46 (E), and YMG53 (F)). Bars, 50um.