Vols. Videos

Hemangiopericytoma (HPC)

Last Updated: October 1, 2018

Figure 1: Often appearing as a more aggressive version of a meningioma, hemangiopericytoma is often a complex-appearing extra-axial mass on CT (top row left), with areas of cystic degeneration and hyperdensity reflecting hypercellularity. T2WI (top row right) confirms the extraaxial location with the adjacent CSF cleft. Low T2 signal likely also reflects hypercellularity. Contrast-enhanced image (bottom) demonstrates heterogeneous enhancement of this falx-based lesion. This patient has already had previous resection of their lesion from a left occipital approach.

 

Figure 2: This hemangiopericytoma demonstrates complexity, cystic change and hyperdensity on CT (top row left). The cystic changes and surrounding edema are even more evident on T2WI (top row right). Avid, heterogeneous en...