Lobar torsion is when the part of the lung that remains after a lobectomy twists around inside your chest. The lung is able to twist around because of the extra space that's made when a lobe is taken out. Sometimes the remaining part of the lung will twist around and cut off the blood supply to itself. If the lung doesn't get enough blood and oxygen, it will die. If this happens, you may need additional surgery to remove the entire lung. But if the problem is caught in time, surgery can usually be done to untwist the lung.