Case Report

Angiographic Evidence of a Purely Pial Bihemispheric Intracranial Hemangiopericytoma

Figure 3

Photomicrograph of tissue sections showing papillary and clear cell morphology with hypervascularity, but no characteristic staghorn appearance (a). Necrosis, intratumoral hemorrhage, nuclear atypia, and frequent mitotic figures were seen (b) and there was patchy and strong CD34 staining (c), as well as strong and diffuse CD99 staining (d).
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(b)
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