RESUMO
A successful surgical treatment of two cases of hypopharyngeal stenosis and esophageal obliteration caused by alkaline chemical burns is reported.One patient has recovered respiring,swallowing and speaking functions,and the other also recovered all of these functions except the retained tracheal tube.During the modified jejuno-pharyngostomy,the pharyngojejunal anastomotic stoma was expanded to form a piriform fossa without bottom.Besides,the anastomotic stoma was lowered to the level of laryngeal vestibule so as to prevent food from leaking into the trachea.In the course of clinical observation,we found that different signs existed in different patients who took the corrosive.In the accidental cases,esophageal obliteration often appeared,but in the cases of committing suicide,the obliteration was usually accompanied with hypopharyngeal stenosis,which is very difficult to treat.So the authors emphasize that dilatation and dissection should be undertaken in early stage to prevent the occurrence of hypopharyngeal stenosis.