SELLAR AND SUPRASELLAR HEMANGIOPERICYTOMA MIMICKING PITUITARY-ADENOMA

Hemangiopericytoma is a vascular neoplasm of variable and unpredictabl e malignancy, composed of proliferating capillary pericytes surroundin g endothelial-lined tubes or sprouts. The histological appearance is d iagnostic. The treatment of primary intracranial hemangiopericytoma is surgical excision, supplemented by radiotherapy. Local tumor recurren ce after many years is common, and late and widespread metastasis can occur. Long-term follow-up is mandatory.