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
Type
none (normal interarytenoid fold)
0
glottic (does not enter into the cricoid cartilage)
I
into and through the cricoid cartilage, down to the sixth tracheal ring
II
from the seventh tracheal ring to the carina
III
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Specialty: Pulmonology, Otolaryngology
