Adenoid Cystic Carcinoma in a Mexican Population.

Abstract

To analyze the demographic data, clinical behavior, management (surgery/radiotherapy), disease-free survival (DFS) and overall survival (OS) in Mexican Mestizos with adenoid cystic carcinoma (ACC). A retrospective study comprising all cases with histologic diagnosis of ACC of the head and neck treated from 1986 to 2012. There were 101 cases (69 women and 32 men), with a mean age of 50years; mean evolution time before diagnosis was 25months (range 1-180 months). Most tumors involved maxillary sinus (25.8%), followed by hard palate (15.9%) and parotid gland (10.9%). Surgery was the treatment in 81 cases (80.2%), radiotherapy alone in 3 cases (3%), chemo-radiotherapy in 4 cases (4%) and 13 cases (12.9%) did not receive any treatment. Post-surgery adjuvant radiotherapy was used in 58 cases (57.4%); 6 cases (5.9%) had adjuvant chemo-radiotherapy after surgery and 37 (36.6%) cases did not receive any adjuvant treatment. Mean follow-up time was 52months (range 1-288 months). Histologic patterns were cribriform (50.5%), solid (28.7%), and tubular (11.9%) types. OS was 57.6% and 42.3% at 5 and 10years respectively. DFS was 57.8% at 5years and 49.7% at 10years. Initial management in most cases within this series was surgery followed by radiotherapy. There is more to learn about real benefits of molecular therapies. There were no significant differences in DFS and OS depending on site of involvement. OS did not show statistically significant differences amongst patients with positive and negative lymph nodes.