The role of neck dissection in management of patients with clinically apparent parotid metastatic melanoma - systematic review.

Patients with cutaneous melanoma with metastatic deposits in the parotid gland have poor prognosis due to the high risk of developing distant metastasis. In the era of effective immunotherapy, there is no consensus amongst head and neck surgeons about the extent of neck dissection required for patients presenting with clinically apparent parotid metastasis. This review aims to determine the incidence and pattern of occult neck disease for patients with parotid metastasis reported in literature to help guide clinicians on the extent of neck dissection required. The systematic review search was conducted using PubMed, EMBASE and Medline, using PRISMA guidelines. The inclusion criteria include cases treated with parotidectomy and neck dissection for patients with parotid melanoma metastasis. A narrative synthesis was carried out due to heterogeneity of studies. A total of 14 studies was included. We found no study reporting on outcomes with surgery and adjuvant immunotherapy in this cohort of patients. The incidence of distant metastasis reported was variable but remains high for patients with parotid metastasis. Patients with parotid and neck involvement have poorer prognosis than patients with parotid only metastatic disease. The effect and extent of neck dissection in patients with clinically apparent parotid nodes remains unclear in the era of effective immunotherapy. There is a need for further well-designed studies evaluating the outcomes for such patients following surgery and adjuvant immunotherapy.

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