Lymphoepithelial carcinoma of the head and neck: a SEER analysis of prognostic factors for survival

Abstract

Objective To explore the epidemiological characteristics of patients with lymphoepithelial carcinoma (LEC) of the head and neck and the prognostic factors. Methods We conducted a retrospective cohort study of cases of head and neck LEC retrieved from the Surveillance, Epidemiology and End Results database. Kaplan–Meier survival analysis and the log-rank test were employed to assess overall survival (OS) and cancer-specific survival (CSS). Univariate and multivariate analyses were used to construct Cox regression models. We established nomograms to predict OS and CSS among patients with nasopharyngeal LEC, who were divided into high- and low-risk groups based on the OS nomograms to compare the effects of treatment using the restricted mean survival time (RMST). Results The 5-year OS and CSS rates of the cohort were 70.8% and 74.8%, respectively. Advanced age, unmarried status, black race, distant metastasis, and the absence of surgical treatment were significantly associated with decreased survival rates. RMST did not differ between the combined treatment (radiotherapy and chemotherapy) and radiotherapy monotherapy groups, but chemotherapy alone displayed poor efficacy. Conclusions Head and neck LEC is associated with a favorable prognosis. Radiotherapy plays a significant role in managing patients with nasopharyngeal LEC, which is influenced by multiple prognostic factors.

Lymphoepithelial carcinoma of the parotid gland

“… 2 , 9 In these regions, parotid LEC accounts for 1.7% of all parotid gland tumors and 10% of all parotid malignancies. 9 – 11 Non-endemic regions LEC accounts for approximately 0.4%–0.66% of all malignant salivary gland tumors. 1 , 12 This difference of incidence is related to the rate of EBV infection as it has been reported a strong association with EBV infection and a positive serodiagnosis in almost 100% of patients in the endemic regions.…”