The ultrastructural features of this group of tumours suggest that they are distinct from other meningiomas and possibly derived from blood vessel elements, such as pericytes, rather than arachnoidal cells. The various different subgroups proposed for vasoformative meningiomas are not clearly defined at ultrastructural level, and there appears to be a spectrum between the relatively well differentiated, or angioblastic types and the more malignant, haemangiopericytic forms.
KeywordsPerivascular Space Arachnoidal Cell Smooth Muscle Differentiation Basement Membrane Material Electron Lucent
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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