title: Congenital tracheobronchial stenosis in monozygotic twins.
abstract: A pair of monozygotic twins suffering from noisy respirations and recurrent wheezes since early infancy were referred for evaluation. Using direct coronal CT and 3-dimensional reconstruction of the airway, congenital tracheobronchial stenosis was found in both twin babies, later confirmed by fibre optic bronchoscopy. The cause of congenital tracheobronchial stenosis remains obscure, but even in monozygotic twins an unidentified environmental factor cannot be excluded and may be responsible for discordant bronchopulmonary abnormalities.
  
  
  CONCLUSIONS
  This case report shows that tracheobronchial stenosis may present in monozygotic twins. The pattern of malformation in twins differs from cases described previously.
authors.affiliation: Department of Paediatrics, Chang Gung Children's Hospital and Chang Gung University, Taoyuan, Taiwan.
authors.forename: K S
authors.initials: KS
authors.lastname: Wong
authors.forename: R
authors.initials: R
authors.lastname: Lien
authors.forename: T Y
authors.initials: TY
authors.lastname: Lin
mesh_terms: D001982:Bronchial Diseases / Q000151:congenital* / Q000000981:diagnostic imaging; D001999:Bronchoscopy; D003251:Constriction, Pathologic; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D007223:Infant; D014057:Tomography, X-Ray Computed; D014135:Tracheal Stenosis / Q000151:congenital* / Q000000981:diagnostic imaging; D014430:Twins, Monozygotic