title: Percutaneous retrieval of an unusually large, nonopaque intravascular foreign body.
mesh_terms: D005547:Foreign Bodies / Q000000981:diagnostic imaging* / Q000628:therapy; D006325:Heart Atria / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D014682:Vena Cava, Inferior / Q000000981:diagnostic imaging