Evaluation of Endoscopic Treatment of Zenker's Diverticulum Using LigaSure

Inclusion Criteria: * The patient must have given his/her informed and signed consent * The patient must be insured or beneficiary of a health insurance plan * The patient is available for 12 months of follow-up * The patient has a Zenkers diverticulum as confirmed by a pharyngo-oesophagean transit test, regardless of van Overbeek classification Exclusion Criteria: * The patient is participating in another study * The patient is in an exclusion period determined by a previous study * The patient is under judicial protection, under tutorship or curatorship * The patient (or his/her person-of-trust) refuses to sign the consent * It is impossible to correctly inform the patient * The patient does not read french * The patient is pregnant * The patient is breastfeeding * The patients has a contraindication for a treatment necessary for this study, or for general anesthesia * The patent has a history of complications related to hemostasis * The preoperative checkup indicates potential for hemostasis related problems