chapter  10
Malignant tumours of the salivary glands
ByVincent Vander Poorten, Patrick J. Bradley
Pages 26

INTRODUCTION The broad pathological classication of malignant tumours of the salivary gland comprises epithelial tumours, being the most frequently encountered (> 80%), mesenchymal tumors which are a very mixed group (< 20%), and haematolymphoid tumours (lymphoma and plasmacytoma) making up the remainder of the 2017 WHO classication. Epithelial salivary gland malignancies form one of the most complex diseases in head and neck oncology, due to their low incidence and heterogeneity, both in microscopic appearance and clinical behaviour. A distinction should be made between the paired major salivary glands (parotid, submandibular and sublingual) and the minor salivary glands. The latter are unencapsulated seromucinous glands distributed throughout the entire upper aerodigestive tract, numbering between 500 and 1000, with the majority (< 90%) being located in the oral cavity and oropharynx.1