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choanal atresia

“ This is a paediatric emergency. It is due to congenital failure of perforation of the oronasal membrane . It is associated with malrotatio...

This is a paediatric emergency. It is due to congenital failure of perforation of the oronasal membrane. It is associated with malrotation, DiGeorge syndrome and foetal alcohol syndrome.
CT

•  Bilateral air-fluid levels in the nasal cavity
•  Thickening of the vomer
•  Inward bowing of the maxilla
•  Narrowing of the posterior choanae to <3 mm in a child <2 years of age