<prompt> Which of the following is true about pleomorphic adenoma except -Most common tumor of salivary glandsHas a tendency to invade perineural spaceMost commonly involves the parotid glandIt is also called a mixed tumor  <response>: Ans. is b i.e., Has a tendency to invade perineural space Pleomorphic adenomao This is the Commonest neoplasm of Salivary glands.o The most Common salivary gland involved is Parotid - represent about 60 tumors in the parotid,o Submandibular and minor salivary glands may also be involved rarely,o Pleomorphic adenoma -- Parotid Submandibular minor salivary glands.o They are derived from a mixture of ductal epithelial and myoepithelial cells and therefore they show both epithelial and mesenchymal differentiation - Also called a mixed tumor. 