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Hemangiopericytoma (HPC) is a soft tissue tumor arising from Zimmermann's pericytes, which are modied smoothmuscle cells in the periphery of blood vessels. These pericytes are located outside the reticulin sheath of the endothelium 1,2. HPC is found mostly wherever there is increased vascularity seen. A high incidence of local recurrence and metastasis is reported in HPCs. 3,5
Pradhan et al. (2024) studied this question.