title: Retroperitoneal Hemangiopericytoma in a young woman. Case report and literature review.
abstract: Hemangiopericytoma (HPC) is a primary tumor with mesenchymal vascular origin that represents 1% of all vascular neoplasm. HPC develops from the Zimmerman's pericytes around capillaries venules and it is possible to observe it frequently in the extremities, pelvis, retroperitoneum, head, neck and meninges. The only definitive parameter of malignancy is the development of recurrence or distant metastases. This report describes a case of symptomatic retroperitoneal HPC in a young female patient treated by surgical complete removal of the mass, and literature review. Despite the relatively simple surgical management of retroperitoneal Hemangiopericytoma, its diagnosis still remains difficult and often is incidentally. Patients should undergo a close long-term follow up, by periodic CT scan, due to the high probability of local recurrence or distant metastases that can occur also many years after surgery.
  
  
  BACKGROUND
  Hemangiopericytoma (HPC), Retroperitoneum, Surgery.
authors.forename: Andrea
authors.initials: A
authors.lastname: Balla
authors.forename: Stefano
authors.initials: S
authors.lastname: Mancini
authors.forename: Marco
authors.initials: M
authors.lastname: Catarci
authors.forename: Annarita
authors.initials: A
authors.lastname: Costantino
authors.forename: Giovanni Battista
authors.initials: GB
authors.lastname: Grassi
mesh_terms: D005260:Female; D006393:Hemangiopericytoma / Q000175:diagnosis / Q000601:surgery; D006801:Humans; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000601:surgery