title: Roentgenogram of the month: tapering shadow in anterior right thorax.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008067:Lipoma / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013899:Thoracic Neoplasms / Q000000981:diagnostic imaging*