Hemangiopericytoma overview

Overview
Hemangiopericytomas, along with hemangioendotheliomas and angiosarcomas are tumors that arise from vascular structures. A hemangiopericytoma (HPC) is a type of soft tissue sarcoma that originates in the pericytes in the walls of capillaries (they arise from the cells of Zimmerman, which surround vessels). Both benign and malignant forms are encountered. These tumors are most frequently seen in middle-aged adults.

Typically they have large vessels especially located at its periphery, and commonly involve the lower limbs (35% of cases), especially the thigh, pelvis and retroperitoneum (25%)

Primary osseous lesions are rare.

Diagnosis
Radiologically they appear the same as angiosarcomas and heemangioendotheliomas.