“…5 The acquired form can occur secondary to blunt trauma, chronic bronchopulmonary disease, intubation, instrumentation or, in rare cases, tracheostomy, surgical tracheostomy closure, or tracheoesophageal fistula excision. [5][6][7][8] In our patient, the presence of the single, large, airfilled sac with a possible tracheal defect pointed toward the acquired form, but we could not completely rule Tracheocele commonly occurs on the right side. 5 It usually presents as a slowly progressive, large, air-filled swelling in the neck; it may not produce any other symptoms.…”