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  • Title: Occult parotid involvement in early-stage squamous cell carcinoma of the external auditory canal.
    Author: Chang JW, Lee S, Lee JM, Moon IS, Cho YS, Cho YS, Choi JW.
    Journal: Head Neck; 2021 Sep; 43(9):2655-2662. PubMed ID: 33938083.
    Abstract:
    BACKGROUND: The importance of elective parotidectomy in early-stage squamous cell carcinoma (SCC) of the external auditory canal (EAC) is not well established. METHODS: A retrospective study of 43 patients with early-stage SCC of the EAC who underwent parotidectomy in conjunction with lateral temporal bone resection at three centers. RESULTS: Overall occult parotid involvement (OPI) rate in early-stage SCC of the EAC was 13.9% (6/43). When considering both the anteroposterior position and the bony-cartilaginous position, patients with SCC in both the anterior wall and cartilaginous portion exhibited significantly higher OPI than other locations (37.5% vs. 0%, p = 0.001), with an increase in the OPI predictive value. CONCLUSION: SCC located in either the anterior wall of the EAC or the cartilaginous portion of the EAC or both simultaneously showed a high prevalence of OPI, and elective parotidectomy should be considered in those patients.
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