[J. Evan's operation for stenosis caused by cricoid chondronecrosis].

Five further cases of subglottic stenosis after intubation are reported. Lesions were due to chondrolysis of the cricoid cartilage: associating an Evans type anterior laryngotracheoplasty (the principle of which is recalled) with the posterior cricoid incision of the Rethi-Aboulker type produced a marked improvement in the results of posterior laryngoplasty performed alone.