Abstract:

As we know, metastatic breast cancer (MBC) is breast cancer that spreads beyond the primary tumor site to other organs and tissues, which makes it more difficult to treat and reduces patient survival. The epidemiology of metastatic breast cancer represents an important aspect of the study of this disease, which includes its distribution, risk factors, survival, and treatment trends. The spread of metastatic breast cancer (MBC) is a significant public health problem that greatly impacts the lives of many women around the world.