“…The cause of lung torsion is classified into three types: thoracic surgery, traumatic, and spontaneous development ( 2 ). Regarding spontaneous development, lung torsion accompanying the following events has been reported: atelectasis, pleural effusion, spontaneous pneumothorax, thoracocentesis, lung biopsy-induced pneumothorax, lung collapse, congenital defect of the pulmonary ligament, diaphragmatic hernia, obstruction by tumor, pneumonia, completely separated oblique fissure of the lung, and long bronchial pedicle ( 1 , 2 , 4 , 5 ). The main physical findings include dyspnea, a fever, chest pain, and cough, but asymptomatic cases as in the present patient have been reported ( 1 ).…”