Parotid tumours clinical and histological aspects

Abstract

A report is given of 479 cases of parotid tumours admitted to the Department of Otolaryngology, Rikshospitalet, Oslo. Mixed salivary gland tumours were present in 54 per cent. Benign tumours of other types (e. g. adenoma, adenolymphoma, angioma, cysts) constituted 22 per cent. Malignant tumours, comprising adenocarcinoma, muco—epidermoid carcinoma, cylindroma, undifferentiated—and squamous—cell carcinoma, malignant mixed tumour, acinic—cell carcinoma, malignant melanoma and non—epithelial tumours, were diagnosed in 16 per cent. In 4.5 per cent of the cases the tumour appeared to be a non—neoplastic process. In the majority of cases, surgical removal of the tumour was performed. In some malignant cases, supplementary X—ray treatment was given. The tendency of recurrence of the mixed salivary gland tumours after unsuccessful surgery is stressed.