title: Coccygeal ribs: development and appearance in two cases.
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012272:Ribs / Q000002:abnormalities* / Q000000981:diagnostic imaging; D012445:Sacrococcygeal Region / Q000000981:diagnostic imaging