Hemangiopericytoma (HP) is an uncommon vascular neoplasm that originates from small pericapillary spindle-shaped cells called Zimmermann's pericytes. First described by Stout and Murray in 1942,1 HP accounts for no more than 1% of all vascular tumors. It has been reported to arise from these primitive mesenchymal cells throughout the body, typically presenting as a painless mass, with or without compression of adjacent structures. The neoplasm most frequently involves the lower extremities, pelvis, and retroperitoneum, but approximately 15% occur in the head and neck region. According to Batsakis and Rice,2 tumors that involve the tongue, floor of the mouth, cheek, lips, nose and paranasal sinuses, maxilla and mandible, pharynx, parotid gland, and orbital region have been reported.
Malignant hemangiopericytoma of the infratemporal fossa: Report of a case
Bianchi B;
2002-01-01
Abstract
Hemangiopericytoma (HP) is an uncommon vascular neoplasm that originates from small pericapillary spindle-shaped cells called Zimmermann's pericytes. First described by Stout and Murray in 1942,1 HP accounts for no more than 1% of all vascular tumors. It has been reported to arise from these primitive mesenchymal cells throughout the body, typically presenting as a painless mass, with or without compression of adjacent structures. The neoplasm most frequently involves the lower extremities, pelvis, and retroperitoneum, but approximately 15% occur in the head and neck region. According to Batsakis and Rice,2 tumors that involve the tongue, floor of the mouth, cheek, lips, nose and paranasal sinuses, maxilla and mandible, pharynx, parotid gland, and orbital region have been reported.
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