Results: A total of 54 patients underwent MDO and of those 21 patients were found who have undergone both MDO and DLB. The incidence of at least 1 SAL was 71.4% in this group. A subgroup of patients less than 24 months had an incidence of SALs that was 78%. Types of SALs encountered include laryngeal edema (57.1%), tracheobronchitis (42.9%), laryngomalacia (33.3%), tracheomalacia (14.3%), bronc...