title: A giant ancient schwannoma mimicking an adnexal mass: Case report.
abstract: BACKGROUND
  Ancient schwannoma is a rare tumor of the peripheral nerve sheath. As degenerative properties are defined histologically, it can be wrongly interpreted as malignant.
  
  
  METHODS
  The case presented here is of a giant ancient schwannoma with a pelvic retroperitoneal location, which was mimicking an adnexal mass.
  
  
  CONCLUSIONS
  In the rarely seen cases in the retroperitoneum, it may reach very large dimensions.
authors.affiliation: Department of Surgical Oncology, Suleyman Demirel University Faculty of Medicine, Isparta Department of General Surgery Department of Pathology, Medical Faculty, Trakya University, Edirne Department of General Surgery, Mengücek Gazi Education and Research Hospital, Erzincan, Turkey.
authors.forename: Oktay
authors.initials: O
authors.lastname: Karaköse
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Pülat
authors.forename: Serhat
authors.initials: S
authors.lastname: Oğuz
authors.forename: İsmail
authors.initials: İ
authors.lastname: Zihni
authors.forename: Kazım Çağlar
authors.initials: KÇ
authors.lastname: Özçelik
authors.forename: Tülin Deniz
authors.initials: TD
authors.lastname: Yalta
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Eken
mesh_terms: D000291:Adnexal Diseases / Q000000981:diagnostic imaging; D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D009442:Neurilemmoma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery*; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery*