The goal of this observational study is to investigate the features in Chinese male breast cancer (MBC) patients. The main question it aims to answer is:
* The characteristics, treatment patterns and prognosis of Chinese MBC patients. The clinicopathological characteristics, treatment information and follow-up data of participants will be extracted from a Chinese national database (Chinese Society of Clinical Oncology Breast Cancer database) and other involved Chinese centers.
Researchers will investigate the features, survival associated factors and other relevant factors of this population.
The collected variables included: survival time, survival status, year of diagnosis, age, stage, molecular subtype statuses, histology, grade, and surgery, radiotherapy and systemic therapies utilization.
