Functional outcomes after extracapsular dissection with partial facial nerve dissection for small and large parotid neoplasms.

PURPOSE: Multiple surgical options exist for benign parotid tumors without agreement upon a single, best approach. We evaluated the short-term outcomes and rate of complications using the ECD-FND technique for small and large parotid neoplasms involving the superficial and deep lobes of the parotid gland using a categorical approach. MATERIAL AND METHODS: A single surgeon retrospective cohort study with analysis of patient demographics, outcomes, and complication rates was conducted of patients undergoing the ECD-FND for benign parotid neoplasm. Cases from May 2014 to May 2020 with at least 6 months follow up were considered. Complications were assessed by chart review and tumors were categorized by size and by European Salivary Gland Society (ESGS) classification assigned by a neuroradiologist. RESULTS: Fifty-one patients who underwent ECD-FND of suspected benign parotid mass met inclusion criteria. The most common histology was pleomorphic adenoma (56.9%) followed by Warthin's tumor (19.6%). Overall rate of complications was 31.4% with no major complications. Most patients (88.2%) had normal facial nerve function immediately after surgery and all recovered completely in the post operative period. Sialocele occurred in 15.7% of patients with 87.5% resolved within one month and seromas occurred in four patients (7.8%). There was no significant difference in complication rates between the size of tumor (p = 0.889), depth (p = 0.770), or ESGS classification (p = 0.846). CONCLUSIONS: The ECD-FND technique achieved excellent facial nerve outcomes among our cohort, which included a - proportion of large (>3 cm) and deep lobe tumors. Complications rates and outcomes were similar for larger and deep lobe tumors that underwent a ECD-FND approach. LEVEL OF EVIDENCE: 3.