Congenital tracheomalacia is a rare condition where the trachea is soft and flexible causing the tracheal wall to collapse when exhaling, coughing or crying, that usually presents in infancy, and that is characterized by stridor and noisy breathing or upper respiratory infections. Tracheomalacia improves by the age of 18-24 months. The disease is congenital tracheomalacia (Monarch Disease Ontology id MONDO_0019804). Also known as: Congenital Tracheomalacia, congenital major airway collapse, tracheomalacia, congenital.