Figure 4

Microscopic findings of the lung and tongue tumor specimen. (A,B) A lining of tumor cells can be seen along the alveolar walls (arrow) (H &; E, x100). Higher magnification view of the tumor cells shows a predominantly cribriform or tubular growth pattern with numerous gland-like spaces containing homogenous acidophilic materials. (C,D) Squamous cell epithelium and ACC of the tongue (H &; E, x200). Microscopic findings show a predominantly cribriform or tubular growth pattern with numerous gland-like spaces containing mucopolysaccharide, consistent with ACC (H &; E, x400). ACC, adenoid cystic carcinoma; H &; E, hematoxylin and eosin.