title: Occult Laryngeal Foreign Body Mimicking Normal Thyroid Cartilage.
abstract: BACKGROUND
  Foreign body aspiration is common especially in children. The absence of history of choking does not rule out the diagnosis. Diagnosis required high index of suspicion.
  
  
  METHODS
  Undiagnosed foreign body aspiration mostly occurs in bronchial airway rather than larynx and can cause severe complications. In this article, we report a silent laryngeal foreign body aspiration to show that careful history taking and accurate evaluation of radiography are important factors for diagnosis.
  
  
  CONCLUSIONS
  The single most significant factor leading to detect of tracheobronchial foreign body aspiration is a high index of suspicion; this case highlights the possibility of a foreign body in the airway in patients who presents with a recent onset of chronic respiratory complaints.
authors.affiliation: Department of Otolaryngology and Head and Neck Surgery, Hazrate Rasoul Hospital, Iran University of Medical Sciences, Tehran, IR Iran.
authors.forename: Farzad
authors.initials: F
authors.lastname: Izadi
authors.affiliation: Department of Otolaryngology and Head and Neck Surgery, Hazrate Rasoul Hospital, Iran University of Medical Sciences, Tehran, IR Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Hassannia
authors.affiliation: Department of Otolaryngology and Head and Neck Surgery, Firouzgar Hospital, Iran University of Medical Sciences, Tehran, IR Iran.
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Maleki
authors.affiliation: Department of Otolaryngology and Head and Neck Surgery, Hazrate Rasoul Hospital, Iran University of Medical Sciences, Tehran, IR Iran.
authors.forename: Behzad
authors.initials: B
authors.lastname: Pousti
authors.affiliation: Department of Otolaryngology and Head and Neck Surgery, Hazrate Rasoul Hospital, Iran University of Medical Sciences, Tehran, IR Iran.
authors.forename: Ehsan
authors.initials: E
authors.lastname: Shams Koushki
authors.affiliation: Faculty of Trauma Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran.
authors.forename: Sedighe
authors.initials: S
authors.lastname: Mirhashemi
keywords: Foreign Bodies; Foreign Body; Laryngoscopy; Larynx, Laryngeal; Respiratory Aspiration