title: Two cases of tracheal agenesis.
mesh_terms: D000015:Abnormalities, Multiple / Q000473:pathology*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008168:Lung / Q000002:abnormalities / Q000473:pathology; D008297:Male; D014132:Trachea / Q000002:abnormalities* / Q000473:pathology