Bilateral Choanal Atresia
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Answer b) bilateral posterior choanal atresia Bilateral cases present as an emergency at birth because neonates are obligate nasal breathers. The neonate suffers severe respiratory difficulties and cyanosis until he cries and the mouth is opened. After a few quick breathes, the lips close again and this sequence of events continues. If not properly managed, the child commonly die from respiratory obstruction.
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