<prompt> most coomon benign tumor of parotid gland?pleomrophic adenomawahins tumormucoepidermoid tumoradenoid cystic tumor  <response>: Pleomorphic Adenoma : Epithelial Components Tubular and cord-like arrangements Cells contain a moderate amount of cytoplasm Mitoses are rare Stromal or mesenchymal Components Can be quite variable Attributable to the myoepithelial cells Most tumors show chondroid cailaginous differentiation Osseous metaplasia not uncommon Relatively hypocellular and composed of pale blue to slightly eosinophilic tissue. ref : bailey and love 27th ed 