title: Liver recurrence of a subcutaneous temporal hemangiopericytoma: the index case.
abstract: BACKGROUND
  Hemangiopericytoma is an uncommon soft tissue vascular neoplasm. Intraperitoneal hemangiopericytomas such as primary or secondary liver location have been exceptionally described. Its natural history is mostly benign, but recurrences may occur and determining if these late-discovered tumors are distant metastases or synchronous slow and silent-growing locations is sometimes challenging. The histopathological diagnosis and definition of hemangiopericytoma is based on its distinction with solitary fibrous tumors. Liver resection to treat liver hemangiopericytoma seems to be supported by various published experiences.
  
  
  METHODS
  We herein report the first case of liver metastases from a subcutaneous temporal hemangiopericytoma. The patient was treated by a liver resection. CD34 Immunostaining was negative, but strong expression of Bcl2 and CD99 was found in the neoplastic cells. After 1 year of follow-up, the patient is alive without recurrence.
  
  
  CONCLUSIONS
  To date, published data, including the case herein reported, support the need for a prolonged follow-up and the role of liver resection to treat liver metastases of hemangiopericytomas. Complete resection of all gross disease appears to be the most significant prognostic factor.
authors.affiliation: Department of Hepatobiliary Surgery and Liver Transplantation, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris, 27 rue du Faubourg Saint Jacques, 75014 Paris, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Zalinski
authors.forename: Claire
authors.initials: C
authors.lastname: Goumard
authors.forename: Olivier
authors.initials: O
authors.lastname: Scatton
authors.forename: Benoit
authors.initials: B
authors.lastname: Terris
authors.forename: Francoise
authors.initials: F
authors.lastname: Plantier
authors.forename: Nicolas
authors.initials: N
authors.lastname: Dupin
authors.forename: Olivier
authors.initials: O
authors.lastname: Soubrane
mesh_terms: D001943:Breast Neoplasms / Q000473:pathology; D005260:Female; D006393:Hemangiopericytoma / Q000473:pathology* / Q000601:surgery; D006498:Hepatectomy; D006801:Humans; D008113:Liver Neoplasms / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000473:pathology; D014057:Tomography, X-Ray Computed