title: Hemangiopericytoma/solitary fibrous tumor of the greater omentum: A case report and review of the literature.
abstract: BACKGROUND
  Hemangiopericytoma (HPC) has been first described in 1942 by Stout as a tumor originating from the capillary surrounding pericytes. It is known to occur in any anatomical site, especially the extremities and retroperitoneum.
  
  
  METHODS
  We describe a case of a 24year old patient presenting with lower abdominal pain due to a tumor of the greater omentum, the patient was treated by conventional laparotomy with tumor resection and the histological evaluation confirmed the diagnosis Hemangiopericytoma/Solitary fibrous tumor (HPC/SFT). The patient has regularly followed-up with periodic imaging for the last 4 years, with no recurrences.
  
  
  CONCLUSIONS
  According to our knowledge, HPC rarely develops in the greater omentum, only 20 cases were described in the literature. Primary surgical resection is the treatment of choice. There is no benefit of radiation or systemic chemotherapy. Angiogenic inhibitors represent promising systemic therapeutic concepts.
authors.affiliation: Department of General, Visceral and Transplant Surgery, Eberhard-Karls-University Hospital Tuebingen, Germany. Electronic address: rami.archid@med.uni-tuebingen.de.
authors.forename: Rami
authors.initials: R
authors.lastname: Archid
authors.affiliation: Department of General, Visceral and Transplant Surgery, Eberhard-Karls-University Hospital Tuebingen, Germany.
authors.forename: Carl Christoph
authors.initials: CC
authors.lastname: Schneider
authors.affiliation: Institute of Pathology, Eberhard-Karls-University Hospital Tuebingen, Germany.
authors.forename: Patrick
authors.initials: P
authors.lastname: Adam
authors.affiliation: Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University Hospital Tuebingen, Germany.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Othman
authors.affiliation: Department of General, Visceral and Transplant Surgery, Eberhard-Karls-University Hospital Tuebingen, Germany.
authors.forename: Derek
authors.initials: D
authors.lastname: Zieker
authors.affiliation: Department of General, Visceral and Transplant Surgery, Eberhard-Karls-University Hospital Tuebingen, Germany.
authors.forename: Alfred
authors.initials: A
authors.lastname: Königsrainer
keywords: Greater omentum; Hemangioma pericytoma; Mesenchymal tumor