hemangiopericytoma/ハリエニシダ

Sinonasal hemangiopericytomas are rare, occasionally misdiagnosed neoplasms that have often been considered distinct from hemangiopericytomas of other sites. Eleven cases were studied. Nine arose from the nasal cavity and two from the paranasal sinuses. The patients' mean age was 58 years. In nine

Hemangiopericytoma is an infrequent vascular tumor that rarely appears in the head and neck. The nasal cavity and the paranasal sinuses are most often involved. Four cases are added to the literature and some important features are stressed. The clinical presentation is aspecific. Diagnosis is made

The distribution of two endothelial cell markers Factor-VIII-related antigen and Ulex europaeus agglutinin was examined by immunoperoxidase and immunofluorescence techniques in paraffin-embedded specimens representing the three main types of angiogenic neoplasms of the nervous system,