title: [Unusual middle lobe atelectasis demonstrating an intrathoracic tumor-like shadow].
mesh_terms: D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D001261:Pulmonary Atelectasis / Q000000981:diagnostic imaging*; D013902:Radiography, Thoracic