Histologically, a prominent feature are their perivascular pseudorosettes, which are ring-like structures formed by tumors cells with rod-shaped ependymal processes, like cilia, surrounding a centralized blood vessel.

从组织学上看，主要的特征是血菊形团，室膜的棒状突起（如纤毛）形成的环状结构，围绕着中央的血。