Incidence and Possible Predictive Factors of Facial Nerve Paralysis after Superficial Parotidectomy for Benign Tumours: Our Experience.

Abstract

Salivary gland tumors represent 3-10% of all head and neck neoplasms. Most of the tumours are benign with parotid gland being most commonly affected. Surgical intervention in the form of parotidectomy forms the mainstay of treatment. Among the various postoperative complications that may occur after parotidectomy, facial nerve weakness is the most dreaded one for both the surgeon as well as the patient. In the literature, the incidence of transient facial weakness after parotid surgery ranges from 10 to 68%, and long-term dysfunction ranges from 0 to 19%. Apart from injury mechanisms such as nerve division, stretch, thermal injuries, ischemia, several other risk factors such as tumour size, disease duration etc. have also been identified for post parotidectomy facial nerve dysfunction which vary considerably from study to study. Thus, facial nerve injury despite being a common and dreaded complication is also a preventable one. We in our institute conducted a retrospective study from January 2018 to December 2021to evaluate the incidence of facial nerve weakness and possible predictive factors among 60 patients who underwent superficial parotidectomy for benign tumours and found that when it comes to benign tumours surgical technique rather than tumour factors are more important in preventing nerve injury. Undertaking this study was important in order to emphasize the importance of extensive preoperative planning and better surgical practices among budding head and neck surgeons in our country.