There are two forms of choanal atresia, bilateral and unilateral atresia.
Unilateral choanal atresia is less threatening to a patient because the nasal passage is only blocked on one side. This allows the patient to breathe somewhat normally till adulthood, only a mucus discharge is noticeable in the affected side of the nose with sinus infection.
Unilateral choanal atresia repair is being performed by using Co2 Laser in Jubilee Hospital Trivandrum, Kerala, South India.
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