title: Primary Primitive Neuroectodermal Tumor Arising from an Ovarian Mature Cystic Teratoma in a 12-Year-Old Girl: A Case Report.
abstract: BACKGROUND
  Ovarian mature cystic teratomas (MCTs) rarely transform to primary primitive neuroectodermal tumors. This case report offers evidence that MCTs might have undetected microfoci of malignant neural tumors.
  
  
  METHODS
  We describe the case of a 12-year-old girl who presented with right-sided abdominal pain and distention. Intraoperative findings revealed a right ovarian MCT. However, pathology showed a 0.5-cm focus of malignant neural tumor within the 11-cm MCT.
  
  
  CONCLUSIONS
  This patient will need close follow-up with a multidisciplinary team because the clinical implications of this transformation has yet to be defined.
authors.affiliation: University of New Mexico, School of Medicine, Albuquerque, New Mexico. Electronic address: ashleyhuff@salud.unm.edu.
authors.forename: Ashley
authors.initials: A
authors.lastname: Jaramillo-Huff
authors.affiliation: Division of Pediatric and Adolescent Gynecology, Department of Pathology, University of New Mexico Health Science Center, Albuquerque, New Mexico.
authors.forename: Rania
authors.initials: R
authors.lastname: Bakkar
authors.affiliation: Division of Pediatric and Adolescent Gynecology, Department of Pathology, University of New Mexico Health Science Center, Albuquerque, New Mexico.
authors.forename: Jason Q
authors.initials: JQ
authors.lastname: McKee
authors.affiliation: Division of Pediatric and Adolescent Gynecology, Department of Pediatric Surgery, University of New Mexico Health Science Center, Albuquerque, New Mexico.
authors.forename: Nancy
authors.initials: N
authors.lastname: Sokkary
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D009373:Neoplasms, Germ Cell and Embryonal / Q000473:pathology* / Q000601:surgery; D018242:Neuroectodermal Tumors, Primitive / Q000473:pathology* / Q000601:surgery; D010051:Ovarian Neoplasms / Q000473:pathology* / Q000601:surgery; D013724:Teratoma / Q000473:pathology* / Q000601:surgery
keywords: Adolescent; MCT; Mature ovarian cystic teratoma; PNET; Primary primitive neuroectodermal tumor