title: Pattern of combined collapse of right upper and right middle lobes.
abstract: Three cases of combined collapse of the right upper and middle lobes are presented. The appearance is the mirror image of collapse of the left upper lobe. The radiographic appearance is described, and possible causes and mechanisms of collapse are discussed.
mesh_terms: D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D001261:Pulmonary Atelectasis / Q000000981:diagnostic imaging* / Q000209:etiology; D011859:Radiography