BCHE and Facial palsy: The reasons for exclusion were as follows: implanted defibrillator, rejected taking part in the study and signing informed consent, intraoperative sacrifice of the facial nerve due to malignant involvement (each excluding two patients); fibrosis of the facial nerve trunk, pseudocholinesterase deficiency, revision operation, preoperative facial nerve palsy, and no identification of the facial nerve trunk (each excluding one patient).