A unique parotid adenocarcinoma.

A large number of different types of benign and malignant tumours of the salivary glands are recognized, and rare and unusual variants arise from time to time that can be difficult to interpret. We report an apparently unique parotid neoplasm that does not fit any of the currently recognized diagnostic groups and can best be termed lymphadenocarcinoma. Clinical and pathological features are described, and its possible relationship to recognized tumour types is examined.