Light micrograph of a pleomorphic adenoma, a type of benign (non-cancerous) salivary gland tumour that is made up of epithelial and myoepithelial cells. The cells, which have oval round nuclei (small oval blue structures) are arranged in intersecting lines, within a so-called 'chondromyxoid stroma' (the dark blue-purple background in between the strands of cells). Haematoxylin and eosin stained tissue section. Magnification: x200 when printed at 10cm wide.