A 53-year-old patient complains of a tumour in the right parotid region. The tumour was revealed six months ago, wi- thin this period it doubled in size. Objectively: the right parotid region has a dense 1,5 x 2 cm large neoplasm, the duct of the right parotid gland secretes transparent saliva. The gland puncture gave no results. What disease are these clinical presentations most typical for?