Torsion of the remaining lung lobe after lobectomy is an uncommon event which is difficult to diagnose and may result in hemorrhagic infarction and fatal gangrene. We report a case of right upper lobe torsion after middle lobe resection for bronchiectasis, diagnosed with noninvasive pulmonary computerized tomography (CT) angiography. Rethoracotomy with an upper lobectomy was performed. She was asymptomatic at the two-year follow-up. Although the bronchoscopy has a great value in the diagnosis, CT angiography is an effective noninvasive method for confirming the correct diagnosis. A high index of clinical suspicion, early diagnosis and aggressive management may improve survival.