The authors report on endonasal dacryocystorhinostomy: 19 operations have been done (5 pre-saccal stenosis and 14 post-saccal stenosis). Operations on pre-saccal pathways allow to reduce significantly the tearing, without suppressing it completely. Surgery of the post-saccal pathways gives the best results, with the suppression of the tearing or/and of the superinfection in almost all cases. The pathology of the excretory lacrymal pathways, the surgical technique and the detailed results will be presented.