title: Rounded opacity in a young man's chest.
mesh_terms: D000328:Adult; D006801:Humans; D008101:Liver Abscess, Amebic / Q000000981:diagnostic imaging*; D008169:Lung Abscess / Q000000981:diagnostic imaging*; D008297:Male; D013902:Radiography, Thoracic; D014463:Ultrasonography