Lung decortication is a surgery to remove the pleural membrane covering the lungs to promote proper lung expansion and breathing. A dysfunctional pleural membrane can restrict lung movement and cause breathing problems or collapse. One condition requiring lung decortication is fibrothorax, where abnormal thickened tissue develops over the pleural membrane, weighing down the lungs. Doctors perform tests to ensure safety before lung decortication due to risks like fusion of the intercostal space.