title: Primary retroperitoneal mature cystic teratoma in an adult: A case report.
abstract: BACKGROUND
  Mature cystic teratoma is one of the most common tumors of the ovaries; however, primary retroperitoneal lesions are rare entities in adults.
  
  
  METHODS
  We report a case of a 33 year-old woman noticing a mass in her epigastric and left upper abdominal region without any specific signs and symptoms. Radiological evaluation revealed a retroperitoneal mass with extension from the posterior aspect of the pancreas to the pelvic cavity, composed of calcifications and cystic elements.
  
  
  CONCLUSIONS
  The tumor was resected through a midline laparotomy and the pathology report confirmed the diagnosis of a mature cystic teratoma with no evidence of malignancy or immature components.
authors: Clinical Research Development Center of Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Electronic address: hassan.peyvandi@gmail.com.
authors: Hassan
authors: H
authors: Peyvandi
authors: Clinical Research Development Center of Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors: Fahimeh
authors: F
authors: Arsan
authors: Clinical Research Development Center of Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors: Athena
authors: A
authors: Alipour-Faz
authors: Clinical Research Development Center of Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors: Maryam
authors: M
authors: Yousefi
keywords: Case report; Mature cystic teratoma; Primary; Retroperitoneum