[Three cases of traumatic lung cyst].

There are few reports of nonpenetrating blunt chest trauma causing traumatic lung cyst. Three young male cases of traumatic lung cysts from motor vehicle accident were reported. Two of them, 25 and 17 years old male, had benign clinical courses by conservative management. But in another case of 25-year-old male, lung abscess followed infection of lung cyst occurred despite antibiotic therapy. A left lower lobectomy and a partial resection of left upper lobe was performed 46 days after the injury. Culture of the contents of the abscess confirmed Acinetobacter. His subsequent recovery was uneventful and he was discharged one month after the operation.