Giant cranial hemangiopericytoma: MR and angiographic findings

The authors detail the MR and angiographic findings of a very large hemangiopericytoma in the skull of a 63-year-old woman. Angiography showed a marked tumor blush with early draining veins; MR showed heterogeneously increased T2 signal intensity and enhancement with gadolinium secondary to the richly vascularized tumor.