Figure 3

Adenoid cystic carcinoma of the breast with KIT expression: cribriform pattern (a) and solid pattern (b). In the two architectural patterns, more than 90% of cells expressed KIT, with membranous and/or cytoplasmic immunoreactivity. Normal mammary gland with KIT protein expression (c and d). Benign ductal epithelial cells expressed KIT whereas myoepithelial cells did not express KIT (c and d).