POSTERIOR AURICULAR NERVE – A NOVEL LANDMARK FOR IDENTIFICATION OF THE FACIAL NERVE IN SUPERFICIAL PAROTIDECTOMY

ABSTRACT Background-Facial nerve identification and preservation is the most critical step in parotid surgery. Though there are described landmarks to locate the facial nerve trunk, they have individual variations. The posterior auricular nerve (PAN) is a branch of the facial nerve and is always present, it can be followed to reach the facial nerve trunk. MATERIALS AND METHODS A retrospective cohort study in which analysis of parotidectomy performed from January 2017 to November 2018 at our tertiary referral center was done. RESULTS A total of 23 parotidectomies were performed, of which 18 cases were pleomorphic adenoma. In four cases of pleomorphic adenoma we could clearly identify and preserve the PAN. Using PAN as the landmark the facial nerve trunk was located, all its peripheral branches were dissected and preserved. PAN identification narrows down the target area of dissection to identify the facial nerve trunk. CONCLUSION The posterior auricular branch of the facial nerve can be used as a standard landmark in parotid surgeries, that almost always leads to the facial nerve trunk. CLINICAL SIGNIFICANCE Though identification of PAN may be difficult in all cases, effort must be made to identify it under magnification. If done meticulously PAN can be an ideal landmark to identify facial nerve in parotid surgery. KEYWORDS Parotid surgery, Superficial Parotidectomy, Posterior auricular nerve, Facial nerve.

An Experience of Superficial Parotidectomy in Tertiary Care Teaching Hospitals

Background: Superficial parotidectomy is associated with a decreased incidence of transient facial nerve paralysis compared with that of total parotidectomy. Aim: To analyze the clinical presentation, histopathology and complications following superficial parotidectomy performed for benign parotid tumors. Methods: Two center study data was collected from the Surgical Unit I, Department of Surgery AIMC/Jinnah Hospital Lahore (1st January 2012 to October 2018) and Surgical Unit II, Department of Surgery, Sir Ganga Ram Hospital Lahore (November 2018 to 31st December 2020). All patients who underwent superficial Parotidectomy surgery for benign parotid tumors, from 1st January 2012 to 31st December 2020 were assessed for intra-operative and post-operative complications. Demographic data, intraoperative details, and postoperative outcomes of all patients who underwent superficial parotidectomy were collected. Patients with benign parotid tumors on FNAC were included while patients with malignant cells on histopathology were excluded. Results: A total of 50 patients having benign parotid tumors on FNAC underwent superficial parotidectomy during this study period. There were 35 female patients (70%) and 15 male (30%), with female to male ratio of 2.3:1. The age range was 23-70 years with mean age of patients 35.6 years (5.65±SD). In 48% cases the tumor was on left side of face and in 52% cases it was on right side. Amongst 50 cases, on postoperative histopathology, 2 patients had malignant change. Key words: Superficial parotidectomy, pleomorphic adenoma, facial nerve paralysis.

Surgical Outcome of Extracapsular Dissection of Benign Parotid Gland Tumor: A Comparative Study to Superficial Parotidectomy

Background/Objectives: Extracapsular dissection has the advantage of reducing complications by minimizing tissue loss of the parotid without intentionally exposing the facial nerve in patients with benign parotid tumor. However, there has been controversy over the surgical results. Thus, the surgical outcomes of extracapsular dissection for benign parotid tumor was compared to those of superficial parotidectomy.Materials & Methods: A retrospective chart review was conducted with 132 patients who received surgery for benign parotid tumor in our center from January 2014 to December 2018 retrospectively.Results: A total of 132 people were enrolled, with 62 people receiving extracapsular dissection, 38 people receiving partial superficial parotidectomy and 32 people receiving superficial parotidectomy. No significant difference was found between the three groups regarding complications such as facial nerve palsy, Frey's syndrome, or first bite syndrome. Operation time and hospital stay was significantly short in extracapsular dissection group.Conclusion: For well-selected cases, extracapsular dissection can be considered as an option for surgery of benign parotid tumor.

SP7.1.13 Facial nerve morbidity after superficial parotidectomy in the absence of nerve conductor: a general surgeon experience from a low resource country

Aims After superficial parotidectomy, the incidence of facial nerve injury, for pleomorphic adenoma of the parotid gland, remains the topic of interest despite different techniques to identify the nerve during surgery. We aim to evaluate the incidence of facial nerve injury in patients undergoing superficial parotidectomy in the absence of nerve conductor. Methods After calculating sample size, 101 patients irrespective of age and gender were included in this cross-sectional study at the Department of Surgery, for nine years, from 1st January 2012. The primary outcome was the incidence of temporary or permanent facial nerve injury with a follow-up period of 12 months. The data was calculated using SPSS version 23, where mean and standard deviation were calculated for continuous variables, and frequencies were calculated for categorical data. Results Facial nerve injury was evident in 16/101 (15.8%) patients. Among these, the main truck of facial nerve was involved in 6(5.9%); temporary loss of function in 4(4.0%) while permanent injury in 2(2.0%). Most common branch of facial nerve affected was marginal mandibular nerve (6, 5.9%), of which 4(4.0%) had a permanent loss. Additionally, four (4.0%) patients developed salivary fistula whereas (2%) patients developed Frey’s syndrome. Conclusion Facial nerve injury should be clearly explained, in the consent, to the patient as a medicolegal purpose. Where the nerve stimulator is not available, identification of the proposed anatomical landmarks allows a safe recognition of the facial nerve.

First branchial cleft anomaly extending to parapharyngeal space

First branchial cleft anomalies are quite rare, and the majority of them are found in and around the ear canal, mostly superficial to the facial nerve. Very rarely, the anomalous tract of the first branchial cleft can go deeper to the facial nerve, necessitating a meticulous and extensive surgery. A 21-year-old student presented with slowly increasing cystic swelling in the infra-auricular region. Findings of the magnetic resonance imaging were consistent with the first branchial cleft cyst, which also exhibited a deeper extent of the lesion into the parapharyngeal space. The entire tract was excised along with the superficial parotidectomy by an open approach. In addition to illustrating the presentation and management of this peculiar case, the present report also reviews the latest literature around their management.

The impact of radical parotidectomy with immediate facial nerve reconstruction: a quality-of-life measure

Objective Immediate facial nerve reconstruction is the standard of care following radical parotidectomy; however, quality of life comparisons with those undergoing limited superficial parotidectomy without facial nerve sacrifice is lacking. Method Patients who underwent parotidectomy were contacted to determine quality of life using the University of Washington Quality of Life and Parotidectomy Specific Quality of Life questionnaires. A total of 29 patients (15 in the radical parotidectomy and 14 in the limited superficial parotidectomy groups) completed and returned questionnaires. Results Using the University of Washington Quality of Life Questionnaire, similar quality of life was noted in both groups, with the radical parotidectomy group having significantly worse speech and taste scores. Using the Parotidectomy Specific Quality of Life Questionnaire, the radical parotidectomy group reported significantly worse speech, eye symptoms and eating issues. Conclusion Those undergoing radical parotidectomy with reconstruction had comparable overall quality of life with the limited superficial parotidectomy group. The Parotidectomy Specific Quality of Life Questionnaire better identified subtle quality of life complaints. Eye and oral symptoms remain problematic, necessitating better rehabilitation and more focused reconstructive efforts.