COEXISTING PLEOMORPHIC AND TUBULAR BASAL-CELL ADENOMAS OF THE PAROTID-GLAND

We report a hitherto undescribed case of co-existence of a pleomorphic adenoma and a tubular basal cell adenoma affecting the superficial lo be of the left parotid gland of a 53-year-old man. The histology of th e pleomorphic adenoma is also of interest in that the prominent adipos e metaplasia of its myxoid stroma yielded an appearance reminiscent of myxoid lipoma. The tubular basal cell adenoma showed gross cystic cha nge, and its solid portion consisted of closely packed tubules lined b y double layers of cuboidal cells with little intervening stroma. Unli ke Warthin's tumour and membranous basal cell adenoma, both pleomorphi c and tubular basal cell adenomas exhibit no propensity towards multic entricity or bilaterality. We, therefore, believe that their co-existe nce in the superficial lobe of the parotid gland of our patient is a m ere concidence rather than association.