The diagnosis should be suspected on radiographs with an unusually located collapsed lobe and features suggestive of venous congestion.
In theory, the increased intrathoracic potential space created following surgery can redistribute the pulmonary fissures in an abnormal way sufficient to facilitate the twisting of the remaining lobe(s) and thus compromising the vascular and bronchial pedicle. In literature, the most common cause is secondary to surgery with most case reports following either lung transplantation or more frequently lobectomy.
Pulmonary torsion is a rare but potentially rapidly fatal condition that involves a 180 degree or greater hilar twist of the lung resulting in devascularisation and complete collapse.
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