title: A huge solitary fibrous tumor localized in the pancreas: a young women.
abstract: BACKGROUND
  Solitary fibrous tumor is an uncommon spindle cell tumor which were first described in 1931 at pleura; it should be seen rarely in extra-pleural localization.
  
  
  METHODS
  We report the ninth case of pancreatic solitary fibrous tumor in a 24-year-old woman who presented with mild epigastric pain radiating to the back and chronic constipation. Imaging studies confirmed a solitary mass in the epigastric region that begins from posterior of stomach, fills little curvature and extends to pelvis, invades vascular structures by encircling them and extends to retroperitoneal regions that was considered as it may have mesenchymal origin. The patient underwent an enucleation of the mass which was diagnosed as solitary fibrous tumor, supported by immunohistochemical studies showing positivity for CD34, vimentin and SMA.
  
  
  CONCLUSIONS
  There is limited data regarding biological behavior of solitary fibrous tumors with extra-pleural localization, because they are rare tumors. They are generally asymptomatic and slow growing tumors and it is difficult to distinguish them from other mesenchymal tumors. These issues as well as the prior nine cases are discussed.
authors.affiliation: Department of Pathology, Erciyes University Medical School. Kayseri, Turkey. hktasdemir@erciyes.edu.tr
authors.forename: Arzu
authors.initials: A
authors.lastname: Tasdemir
authors.forename: Isin
authors.initials: I
authors.lastname: Soyuer
authors.forename: Alper
authors.initials: A
authors.lastname: Yurci
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Karahanli
authors.forename: Hizir
authors.initials: H
authors.lastname: Akyildiz
mesh_terms: D000199:Actins / Q000378:metabolism; D018952:Antigens, CD34 / Q000378:metabolism; D005260:Female; D006801:Humans; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging* / Q000378:metabolism / Q000601:surgery*; D054364:Solitary Fibrous Tumors / Q000000981:diagnostic imaging* / Q000378:metabolism / Q000601:surgery*; D016896:Treatment Outcome; D014463:Ultrasonography; D014746:Vimentin / Q000378:metabolism; D055815:Young Adult
chemical_list: D000199:Actins; D018952:Antigens, CD34; D014746:Vimentin