Glioblastoma multiforme, pseudop

`Palisading` is when cells line up next to each other, like slats in a picket fence. These rapidly proliferating tumor cells (area outlined in green) appear to palisade around the central pale area, which represents necrotic tissue (region shaded in yellow). Pseudopalisading necrosis is a common feature of glioblastoma multiforme (GBM), which is the tumor shown in this slide.