Fig. 1.From: A case of asymptomatic complete tracheal rings in an adult: case reportBronchoscopy photos. a Complete tracheal rings with the absence of the membranous portion of the trachea immediately below the cricoid cartilage to the tracheal bifurcation were observed. b Membranous tissue was noted at the bifurcation. c Petechiae of the mucosa immediately below the cricoid cartilage was observedBack to article page