Figure 1a,b,c,d: Metastasizing benign pleomorphic adenoma in the lung. Photomicrographs of hematoxylin and eosin stained slides at low magnification (objective lens x4) shows nodules of benign pleomorphic adenoma (1a) composed of epithelial elements in a rich chondromyxoid background (1b; 1c) with no evidence of nuclear or cellular atypia (1d).