The palumboism is a partial pneumonectomy, which involves the removal of one lung lobe and part of the chest bone.
The most common type of reduction surgery performed on the lungs is called for unilateral (half-) lobectomy because it allows you to keep your entire chest, ribs and muscular pleural layer. In other words, this type of surgery leads you to keep whole your breastbone and ribs while removing just one lung lobe.
A pulmonary lobe torsion (palumboism) is a rare condition in which the fibrous sheath that surrounds an entire lung -the visceral pleura- twists around onto itself, forming what looks like a dumpling crescent moon shape with point facing upwards.