title: Morphologic study of the adult trachea at the 7th and 12th ring. A study on specimens from 205 autopsies.
abstract: During 205 autopsies in Finland, the seventh and twelfth tracheal ring were collected and their cross-sectional shapes and measurements were recorded. Six already known cross-sectional shapes were found, appearing with frequencies which differ from previous studies. New finding: the shape of the seventh ring was different from that of the twelfth in 46% of the male and in 60% of the female cases.
mesh_terms: D000328:Adult; D000368:Aged; D002356:Cartilage / Q000473:pathology; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000473:pathology; D008297:Male; D008875:Middle Aged; D014132:Trachea / Q000473:pathology*; D014135:Tracheal Stenosis / Q000473:pathology