And a few types of cancer, such as thyroid cancer similar to the natural history of breast cancer usually is very long, breast cancer cells, the doubling time for an average of 90 days, from the beginning of a malignant cell, after 30 times doubled, to reach the tumor Lcm diameter of the sphere, which will take seven to eight years. The cause of breast cancer has not yet completely clear, the best way to reduce mortality is early detection and early treatment. In tumor metastasis, surgery and radiotherapy alone can cure the vast majority of cases. Once transferred, the only cure is also positive for a small number of patients, so the natural law understanding of breast cancer. Help choose the best breast cancer treatment programme.

Breast cancer directly to the expansion around, the lymphatic and blood flow. The lymph nodes should be to prevent cancer cells from the primary tumor Yat, the first barrier, if cancer cells through the lymph node barrier is usually recidivism supraclavicular lymph nodes and then penetrated into the blood vein. In addition to the transfer axillary lymph node cancer, also involving the parasternal lymph nodes, for more than the second and third and fourth intercostal, in the first half of breast cancer in the area and areola more so, from here then repeat lymph node cancer. Breast cancer cells may also directly cause vascular invasive metastasis. Side by intercostal thoracic vein into the ipsilateral unknown vein into the pulmonary circulation. Breast deep tissue, breast and chest wall into the vein axillary vein into the subclavian vein and unknown vein, lung metastasis is an important way, the flow of qi intercostal vein and the vein-odd vein, the superior vena cava last Rufei, Ki Venous system through intervertebral vein, vertebral venous plexus, after the group connected with the vertebral vein, vertebral venous system and the vena cava blood flow in intra-abdominal pressure can change the flow of each other, so that some patients in the absence of a superior vena cava ( Such as the lungs) transfer before a skull, spine, Pengu, such as the transfer.

For a long time, people found that breast cancer may have been in attendance at the distant metastasis, despite the clinical was not attending to, this constitutes a conservative implementation of the theoretical basis for chemotherapy. According to today has been able to tumor size, lymph node involvement in the number and variety of other biological characteristics of a preliminary estimate of distant metastases minimal level of risk exists.