Pleomorphic adenoma (benign mixed tumour) of the salivary glands: its diverse clinical, radiological, and histopathological presentation

Pleomorphic adenoma is the single most common salivary gland tumour. It has a diverse histological presentation because of varying proportions of different epithelial and mesenchymal elements, and presents clinically and radiologically in various ways as it occurs at many different sites in the head and neck region. The choice of imaging is influenced by its site and size, and a range of options for treatment includes both operation and radiotherapy. The tumour can also present in various ways if it is not removed or treated successfully.