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  • Title: Epidemiology and prognostic indicators in laryngeal lymphoma: A population-based analysis.
    Author: Hong SA, Tajudeen BA, Choi S, Husain IA.
    Journal: Laryngoscope; 2018 Sep; 128(9):2044-2049. PubMed ID: 29392765.
    Abstract:
    OBJECTIVES/HYPOTHESIS: To characterize the epidemiology of primary laryngeal lymphoma and to determine the prognostic factors affecting survival in patients with this disease. STUDY DESIGN: A retrospective cohort study using the Surveillance, Epidemiology, and End Results (SEER) database, including cases from 1973 to 2014. METHODS: A population-based analysis was conducted with patients from more than 15 different geographic regions across the United States. Patients were chosen based on a diagnosis of lymphoma and a primary lymphoma site within the larynx. Two hundred cases were eligible based on the inclusion criteria, and characteristic as well as clinical variables were then extracted from the database and analyzed. Characteristic and clinical variables included age, race, sex, primary site of lymphoma involvement, general histology, specific histologic subtype, tumor grade, and Ann Arbor staging. Exposure variables that were analyzed included radiation therapy and chemotherapy. Overall survival (OS) and disease-specific survival (DSS) were the main outcomes calculated using multivariate analysis. RESULTS: A total of 200 cases of laryngeal lymphoma were identified. The mean age at diagnosis was 64.2 years. The cohort was composed of 53% males. B-cell non-Hodgkin's lymphoma (NHL) accounted for 74% of cases, whereas natural killer/T-cell NHL accounted for 10% of cases. A total of 53.1% of patients received radiation therapy, whereas 47.5% received chemotherapy. The median OS was 9.15 years and median DSS was 24.5 years. OS at 2, 5, and 10 years was 74%, 63%, and 44%, respectively. On multivariate analysis, older age, male sex, and advanced Ann Arbor staging were associated with worse OS, whereas only male sex and advanced Ann Arbor staging were associated with worse DSS (all P values < .05). Radiation and chemotherapy were not associated with improved survival. CONCLUSIONS: Female sex and lower Ann Arbor staging are independent positive prognostic indicators for survival, whereas other clinical variables such as grade and histology do not have an effect on survival. Radiation and chemotherapy do not appear to confer a mortality benefit in patients with primary laryngeal lymphoma, which may have implications on clinical decision making as well as patient education about disease prognosis. LEVEL OF EVIDENCE: 4. Laryngoscope, 128:2044-2049, 2018.
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