title: Novel naval navel artifact.
mesh_terms: D000005:Abdomen; D002648:Child; D005471:Fluoroscopy; D005740:Gases; D006801:Humans; D007422:Intestines / Q000502:physiology; D008297:Male; D010146:Pain / Q000209:etiology; D014472:Umbilicus / Q000000981:diagnostic imaging*
chemical_list: D005740:Gases