TABLE 2.

DEFECTS IN CARTILAGINOUS SUPPORT STRUCTURE

Congenital Anomaly	Description of Defect
Laryngomalacia	Cartilaginous support structures of larynx lack integrity
	Likely abnormal neuromuscular input
Tracheomalacia	Foreshortened and/or weak tracheal rings
Subglottic stenosis	Elliptical or small cricoid ring
Laryngeal cleft	Defect in posterior lamina of cricoid ring
Complete tracheal rings	Tracheal cartilage rings form complete rings

Adapted by permission from Reference 65.