title: Relapsing paraganglioma of the inferior laryngeal paraganglion: case report and review of the literature.
abstract: BACKGROUND
  Laryngeal paragangliomas are very rare neoplasms derived from the superior or inferior laryngeal paraganglia. The paragangliomas of the inferior laryngeal paraganglion, depending on their anatomic variability, can give rise to two different clinical expressions of the same process, namely the so-called thyroid paragangliomas and the inferior laryngeal or subglottic paragangliomas.
  
  
  METHODS
  We present a case for which we have not found any previous descriptions of a cervical and subglottictracheal relapse of a thyroid paraganglioma removed 3 years earlier. We review the literature.
  
  
  RESULTS
  We have found a total of 22 paragangliomas of the inferior laryngeal paraganglia, 23 including our case.
  
  
  CONCLUSIONS
  Thyroid paragangliomas and inferior laryngeal or subglottic paragangliomas should be included under the term "paragangliomas" of the inferior laryngeal paraganglion. These tumors are slow growing, benign, hypervascular, and much more common in middle-aged women. Immunohistochemistry is essential for its diagnosis. Open, conservative surgery is the treatment of choice.
authors.affiliation: Department of Otorhinolaryngology, La Princesa Hospital, Autonomous University, Diego de León 62, Madrid 28006, Spain. ahinojar@hlpr.insalud.es
authors.forename: Adolfo G
authors.initials: AG
authors.lastname: Hinojar
authors.forename: Juan Ramón
authors.initials: JR
authors.lastname: Prieto
authors.forename: Elia
authors.initials: E
authors.lastname: Muñoz
authors.forename: Adolfo A
authors.initials: AA
authors.lastname: Hinojar
mesh_terms: D001707:Biopsy, Needle; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007822:Laryngeal Neoplasms / Q000473:pathology* / Q000601:surgery; D007825:Laryngectomy / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000473:pathology* / Q000601:surgery; D010235:Paraganglioma / Q000473:pathology* / Q000601:surgery; D012086:Reoperation