Primary hemangiopericytoma of the tibia: MR and angiographic correlation

The Magnetic Resonance Imaging (MRI) appearances of primary osseous hemangi opericytoma (HPC) have been rarely described. We report on a 46-year-old Ch inese man with primary osseous HPC of the right tibia, The characteristic v ascular distribution of this tumor, presenting with a "spoke-wheel" appeara nce on MR images and with angiographic correlation, is described. Although not pathognomonic, this MR appearance may be an important finding in sugges ting the diagnosis of osseous HPC.