title: Immature teratoma of the maxillary sinus: a rare pediatric tumor.
abstract: OBJECTIVE
  Noncongenital immature teratomas in the head and neck are extremely rare, and to our knowledge have not previously been reported in the maxillary sinus of a pediatric patient.
  
  
  METHODS
  Teratomas are neoplasms that contain tissue from more than 1 embryonic cell layer that is foreign to the location where they arise and are most commonly found in the sacrococcygeal and gonadal regions in children. We present an unusual case of an immature teratoma in the maxillary sinus of a 10-year-old boy and discuss the diagnostic workup, management, and clinical course.
  
  
  CONCLUSIONS
  Immature teratomas represent a subset of benign teratomas with immature elements that may carry a worse prognosis.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, University of Maryland School of Medicine, Baltimore.
authors.forename: Alice E
authors.initials: AE
authors.lastname: Chang
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, University of Maryland School of Medicine, Baltimore.
authors.forename: Bryan T
authors.initials: BT
authors.lastname: Ambro
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, University of Maryland School of Medicine, Baltimore.
authors.forename: Scott E
authors.initials: SE
authors.lastname: Strome
authors.affiliation: Department of Pathology, University of Maryland School of Medicine, Baltimore.
authors.forename: John C
authors.initials: JC
authors.lastname: Papadimitriou
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, University of Maryland School of Medicine, Baltimore.
authors.forename: Kevin D
authors.initials: KD
authors.lastname: Pereira
mesh_terms: D017024:Chemotherapy, Adjuvant; D002648:Child; D006801:Humans; D008297:Male; D008444:Maxillary Sinus Neoplasms / Q000473:pathology* / Q000628:therapy; D009361:Neoplasm Invasiveness; D009364:Neoplasm Recurrence, Local / Q000628:therapy; D009915:Orbit / Q000473:pathology / Q000601:surgery; D018714:Radiotherapy, Adjuvant; D035583:Rare Diseases / Q000628:therapy; D019651:Plastic Surgery Procedures; D013724:Teratoma / Q000473:pathology* / Q000628:therapy; D014057:Tomography, X-Ray Computed