title: [Two cases of pericardial diverticulum appearing as upper mediastinal mass shadows on chest X-ray].
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004240:Diverticulum / Q000000981:diagnostic imaging*; D005260:Female; D006331:Heart Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008476:Mediastinal Cyst / Q000000981:diagnostic imaging; D008875:Middle Aged; D010496:Pericardium / Q000000981:diagnostic imaging; D011187:Posture; D014057:Tomography, X-Ray Computed