Tumores malignos de glándulas salivales mayores en la Comunidad de Madridepidemiología descriptiva y análisis de supervivencia

Abstract

Malignant neoplasms of the major salivary glands are uncommon and according to various statistics, they represent less than 0.5% of all malignancies and less than 5% of malignant head and neck tumors. The annual incidence rates in the world vary between slightly less than 2 and greater than 0.05 per 100,000.Salivary gland carcinomas represent a great number of diverse nosological entities with histological patterns overlapping between different tumor pathologies complicating their diagnosis. As the incidence of these various tumours is low and their histological classification is comparatively difficult because of the tumours’ morphologic heterogeneity, epidemiological studies are often based on limited clinical numbers. Reports from several parts of the world have shown differences in the incidence of salivary gland tumours and variations in the frequency of each histological type have also been reported.Currently we rely on the classification scheme presented by the world health organization (WHO, 2005) which is based on morphology, histological features, pattern recognition and histogenesis...