title: Mediastinal herniation of the pleural sac: occurrence in massive pleural effusion.
abstract: In a review of 50 patients with massive pleural effusion, mediastinal herniation of the pleural sac occurred in 16 patients (32 percent). Right-to-left herniation (ten patients) was more common than left-to-right (six patients). Herniation occurred only in the posteroinferior mediastinum (D5-D11). Fourteen patients had displacement of the mediastinum away from the side of pleural effusion. Disappearance of herniated sac in every patient following thoracocentesis confirmed the diagnosis.
mesh_terms: D006547:Hernia / Q000000981:diagnostic imaging* / Q000209:etiology; D006801:Humans; D008482:Mediastinum / Q000000981:diagnostic imaging*; D010995:Pleural Diseases / Q000000981:diagnostic imaging* / Q000209:etiology; D010996:Pleural Effusion / Q000150:complications* / Q000000981:diagnostic imaging; D011859:Radiography