Evans classified congenital clefts of the larynx and tracheoesophagus.
Location of clefts: posterior wall of the larynx and trachea
Orientation: midline sagittal
Description of Cleft
none (normal interarytenoid fold)
glottic (does not enter into the cricoid cartilage)
into and through the cricoid cartilage, down to the sixth tracheal ring
from the seventh tracheal ring to the carina
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Specialty: Pulmonology, Otolaryngology