Pleomorphic Adenoma
Comments:
Pleomorphic adenomas (PA) have epithelial, myoepithelial and stromal components and the histopathologic appearance of a classic PA can be variable depending upon the relative proportion of these elements. This low power view of a PA shows a well-demarcated tumor with a lobulated growth pattern. The tubular and acinar structures formed by the epithelial component are admixed with myoepithelial cells in a background of myxoid stroma (higher magnification of the previous image).