Tracheocele; a case of rare clinical entity.

Tracheocele is a herniation of the tracheal mucous membrane and it is rarely reported in the literature. It may be a congenital defect or an acquired lesion. Traumas, high pressure injuries, long lasting tracheostomy, obstructive tracheal diseases, recurrent infections of the mucous glands of the trachea with subsequent ductal obstruction and dilatation may play a role at the etiology.