Supernumerary thoracic ribs.
D000328:Adult; D006801:Humans; D008297:Male; D013902:Radiography, Thoracic; D012272:Ribs / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013131:Spine / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013904:Thoracic Vertebrae / Q000002:abnormalities*; D013909:Thorax / Q000002:abnormalities