title: Large painless intrathoracic mass.
mesh_terms: D001859:Bone Neoplasms / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000000981:diagnostic imaging; D010954:Plasmacytoma / Q000000981:diagnostic imaging*; D011859:Radiography; D012272:Ribs / Q000000981:diagnostic imaging; D013899:Thoracic Neoplasms / Q000000981:diagnostic imaging*