PET/CT of hemangiopericytoma of the sacrum

Hemangiopericytoma (HPC) is a tumor of the somatic soft tissues thought to be derived from pericytes. Hemagiopericytoma arising from bone is rare. We present a case of primary osseous HPC arising from the sacrum with characteristic imaging findings on CT and MR, as well as histopathologic findings. We also present findings on PET/CT imaging, which have not been previously published in the literature.