BREAST CANCER BASE

Breast cancer is the breast ductal epithelial cells in various internal and external factors of cancer, the cells are deprived of the normal characteristics of dysplasia, which exceeds the limits of self-repair and premalignant disease. Clinical breast lumps for a major performance. Female breast cancer is the most common malignant one. With the high incidence of quite aggressive, but slow progress in the course. Longer survival natural characteristics belong to the medical milk tumor "of rock" and so on.

The basic structure of the breast
Breast mainly by the glands, ducts, fatty tissue components. Breast glands from 15 to 20 Lobectpomy components, each lobe divided into several gland lobule, each gland lobule again from 10 ~ 100 acinar components. These small acinar arranged in and around the duct connected with, a number of small duct between pooled into lobular breast, a number of inter-lobular breast further consolidated into a whole lobe of the mammary duct, or lose duct. Duct lost a total of 15 to 20 to nipple radially arranged for the center gathered at the areola, the openings in the nipple. Losers duct in the nipple Department relatively narrow, followed swelling of the ampulla, known as losers duct sinus, the role of milk storage.

Previous to breast tumors smaller than 2 cm, clinical stage I and without lymph node metastasis of breast cancer Phase II of EBC, Western literature has many reports will I, II breast cancer known as early breast cancer (EBC, early breast cancer). In recent years, because of the biology of breast continuous understanding, the concept of EBC more stringent requirements.

Currently more agreeable to the EBC standards : (1) histologic mean non-invasive cancer (carcinoma in situ), including ductal carcinoma (DCIS), lobular carcinoma in situ (LCIS), the benign early cancer; (2) refers to clinical breast lumps not contravene T0 cancer diameter and mass "of the tiny 0.5cm cancer and cancer lesion location only at the breast, not incidence of lymph node and distant metastasis after treatment, 10-year survival rates of more than 90%.

Female breast cancer is the most common cancer, second only to the incidence of cervical cancer. Breast cancer incidence and mortality were Western Europe, ranking first in North America, Asia, Latin America, Africa, the lowest in recent years, statistics show an increasing trend.

[Causes]
Like other breast cancer, the real cause is not yet clear. But through basic and clinical research, a large number of epidemiological investigation, analysis, known to many factors can affect the development of breast cancer, the more extensive and in-depth study of the endocrine, genetic and viral pathogens of the three factors.