In recent years, the increasing number of breast cancer patients shows the fact breast cancer
is one of the most common cancers in women in China. However, the mortality rate has seen a
dramatic decline mainly due to early detection of breast cancer and the use of effective
multimodel treatment. Recent studies suggest breast cancers are heterogeneous and recognized
by biological subtypes, which lead to markedly different clinical outcome.
Adjuvant chemotherapy is widely used in the treatment for primary breast cancer patients.
Different types of breast cancer cells are sensitive to different types of drugs.There is no
data to support the information about the adjuvant chemotherapy regimens for different
subtypes breast cancer patients， especially for Chinese women.
The investigators hypothesized to confirm the possibility of finding the adjuvant
chemotherapy aimed to different subtypes of breast cancer.