Pathologic features of special type breast cancer        LI Ting，ZHANG Hong. Department of Pathology, Peking University First Hospital，Beijing 100034，China
Corresponding  author ：LI Ting，E-mail：lixiaoting12@hotmail.com
Abstract    On pathology, in contrast to invasive ductal carcinoma, not otherwise specified, which accounts for more than half of the whole group of breast cancer, special type breast cancer refers to a group of heterogeneous subtypes of breast cancer. Special type breast cancer has much lower incidence and relative defined clinical and histological characteristics. The biologic characters and natures have been recognized for some of the subtypes.