Diagnosis is conducted according to the severity of the symptoms. Initially pulmonary function tests are administered. These tests include the lungs' capability of air intake and outtake, and gas flow of oxygen and carbon dioxide between the body and environment. Following these function tests a special type of Chest CT scan or a bronchoscopy will be ordered. The results of the scan and bronchoscopy will display the status of the condition. A mild case of<unk>  would be if the patient's trachea condenses 50% of its normal space when exhaling. Moderate<unk>  would be 25% of the normal trachea space constricting and a severe case would be if the walls touch each other.<unk>  is thought to be underdiagnosed as mild cases may be asymptomatic and symptoms are ofen mistaken for more common respiratory conditions like Athsma and Chronic obstructive pulmonary disease.
Tracheobronchomalacia
Chronic obstructive pulmonary disease
Bronchomalacia
Bronchiectasis
Tracheomalacia
Lung cancer
Tracheal tumor
Asthma