Fig.3From: Multifocal thoracic intradural extramedullary anaplastic ependymoma: case report and review of the literatureHistology of our anaplastic ependymoma. A Increased mitotic activity and cellular anaplasia are readily evident in this image. B Microvascular proliferation. The proliferating endothelial cells practically occlude the lumen. C The tumor cells are arranged around a blood vessel creating a perivascular pseudorosetteBack to article page