Young Breast Cancer Cohort Study

Prospective Cohort Study for Development of Personalized Treatment Strategy Based on Biologic Tumor Behavior and Clinical Characteristics in Young Breast Cancer (YBC) Patients

This study is prospective cohort study to investigate and identify comprehensively the clinicopathological features and long-term outcome of young breast cancer (YBC).

We have enrolled Breast cancer patients under 40 year-old and collected their baseline characteristics including tumor character, familiar history and other background information. Moreover, we have collected breast cancer tissue/blood sample for analyzing genetic characteristics, if patient agree to genetic analysis.

Inclusion Criteria:

1. Diagnosis with breast cancer
2. Age under 40 year-old or diagnosis with breast cancer at pregnancy or within 1year after delivery
3. Obtained informed consent form

Exclusion Criteria:

1) Cannot understand or disagree to informed consent form