Adenoid Cystic Carcinoma of the Head and Neck: Epidemiology and Predictors of Prognosis

Copyright © 2013 Daniel Monteiro et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Objectives: The biologic behavior of the adenoid cystic carcinoma (ACC) and the factors predicting outcome for these tumors are still poorly understood. Our objective is to analyze the predicting factors and the value of different treatment possibilities, since none sole treatment has been standardized. Methods: A retrospective analysis of the epidemiologic, clinical and histologic aspects of ACC, as well as treatment options and other prognostic factors of all the cases of ACC of the head and neck treated at this Institution were analyzed. From 1974 until 2011, 152 patients were diagnosed with ACC and treated at the Portuguese Institute of Oncology (Porto Centre). Main outcome measures: overall survival, local recurrence and distant metastasis were calculated by the Kaplan-Meier method. Factors predictive of outcome were identified by univariate and multivariate analysis. Results: The mean age at diagnosis was 55.8 years (range, 19- 83 years). Incidence was higher in the female population, with a female to male ratio of 1.7:1 respectively. The primary tumor location was hard palate and submandibular region in 56 cases, 28 in each location (24.6%), parotid gland (17 cases, 14.9%) and oral cavity excluding palate (16 cases, 14%).Distributions according to T stage were: T1 (29.8%); T2 (30.7%); T3 (17.5%); T4 (22%). The overall 1-year, 5-year and 10-year survival for all patients were 94.6%, 60.5%