Traumatic lung cyst

INTRODUCTION: Traumatic lung cysts have been reported to be comparatively rare. However, we diagnosed 11 cases to have traumatic lung cyst over the past 6 years. We mainly present the most characteristic 3 cases and also discuss our findings for the 11 cases of traumatic lung cyst. CASE 1: A 17-year-old male, who was injured on his left chest after falling from a height of 7 m. He presented in a state of shock and was immediately resected the left lung because of massive bleeding from a damage of pulmonary vein. However, he finally died due to disseminated intravascular clotting (DIC). We recognized a large traumatic lung cyst, which went from the upper lobe to lower lobe thoroughly the resected lung. CASE 2 : A 19-year-old male, who was injured on his left chest in traffic accident. We recognized a wide contusion, cysts and hemorrhage in the left upper lobe on computed tomography (CT) findings. We performed an emergency left upper lobectomy because of the intrabronchial bleeding. CASE 3: An 11-year-old boy, suffered trauma on his right chest when he fell while walking. We recognized minor redness and subcutaneous emphysema in the injured are, in addition to a contusion and cyst in the right lower lobe on CT findings. He was conservatively observed, and both the cyst and contusion gradually contracted. CONCLUSION: Regarding traumatic lung cysts, a quick diagnosis and timely selection of the optimal treatment are important. When a pulmonary injury is serious, then quick surgical treatment is necessary, and a close follow-up is necessary in case undergoing conservative treatment.