OBJECT Hemangiopericytomas are rare tumors that behave aggressively with a high rate of local recurrence and distant metastases. With the aim of determining the outcome and response to various treatment modalities, a series of 39 patients who underwent microsurgical resection for primary meningeal hemangiopericytoma over a 24-year period is presented. METHODS Patients with hemangiopericytoma ...

BACKGROUND Hemangiopericytoma occurs with increasing frequency in 5th decade of life and has prediction for retroperitoneum and extremities. A case of a local recurrence and metastases of hemangiopericytoma is described. CASE PRESENTATION Recurrence of hemangiopericytoma in the greater omentum and the jejunal mesentery as well as metastases in the retroperitoneal space were diagnosed in a 61-...

Intracranial hemangiopericytomas (HPCs) are rare tumors and their radiological appearance resembles that of meningiomas, especially meningothelial meningiomas. To increase the knowledge on the biochemical composition of this type of tumor for better diagnosis and prognosis, we performed a molecular study using ex vivo high resolution magic angle s...

Hemangiopericytoma is an uncommon mesenchymal neoplasm, first described by Stout and Murray in 1942. Hemangiopericytoma is considered to be a tumor of pericytes. Apart from being rare in absolute terms, hemangiopericytoma is uncommon in the head and neck. Most of the cases described till now are usually in the trunk or lower extremities.1 The incidence in head and neck region is less than 20%. ...

BACKGROUND The authors report the case of a 53-year-old woman suffering from thoracic myelopathy caused by intraspinal dissemination of hemangiopericytoma. In literature, hemangiopericytoma is commonly found as an intracranial lesion, and often hematogenously metastasizes to the bone or liver; however, intradural spinal dissemination is extremely rare. CASE DESCRIPTION The patient presented w...

Hemangiopericytoma is a rare vascular neoplasm, which arises from specialized cells (pericytes) around the walls of blood vessel. About 50% of hemangiopericytoma in the series of Stout occurred in the oral cavity and pharynx. Under the World Health Organization (WHO) classification, hemangiopericytoma and solitary tumors of the soft tissues are regarded as features of the same entity in the sof...

BACKGROUND The term solitary fibrous tumor (SFT) is preferred over meningeal hemangiopericytoma (HPC), because NAB2-STAT6 gene fusion has been observed in both intracranial and extracranial HPCs. HPCs are now considered cellular variants of SFTs. METHODS This study analyzes 19 patients with STAT6-confirmed SFTs, who were followed for over 11 years in a single institution. Ten patients (10/19,...

BACKGROUND The authors present a retrospective clinical analysis of meningeal hemangiopericytomas. The long-term outcome and biologic behavior, including local recurrence and extraneural distant metastasis, are elucidated. METHOD Clinical records and radiologic findings of 31 cases with meningeal hemangiopericytoma treated at Seoul National University Hospital and Asian Medical Center between...