This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Pathology, Subject name: Pathology
All of the following are true statements about glioblastoma, except: 
Select and explain. 
A. WHO grade IV tumour, B. Perineuronal satellitosis, C. Pseudo-palisading necrosis, D. Microvascular proliferation
B: Perineuronal satellitosis
Answer: B: Perineuronal satellitosis 
Explanation: Glioblastoma: Infiltrating astrocytoma and glioblastoma (the synonym for "grade IV astrocytoma") account for about 80% of primary brain tumors in adults. WHO grade IV astrocytic tumour On microscopy, necrosis (pseudo-pallisading) and/or microvascular proliferation are present Oligodendroglioma Fried egg appearance (perinuclear halo) Chicken wire capillaries (high degree of vascularization) Perineuronal satellitosis (Tumor cells that infiltrate the cerebral coex often collect around neurons) M/c mutation - IDH2 mutation