Mitotic index, microvascular proliferation, and necrosis define 3 pathological subgroups of prognostic relevance among 1p/19q co-deleted anaplastic oligodendrogliomas. Issue 6 (11th May 2016) - Figarella-Branger, Dominique; Mokhtari, Karima; Dehais, Caroline; Carpentier, Catherine; Colin, Carole; Jouvet, Anne; Uro-Coste, Emmanuelle; Forest, Fabien; Maurage, Claude-Alain; Vignaud, Jean-Michel; Polivka, Marc; Lechapt-Zalcman, Emmanuèle; et al.