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.

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.

Breast cancer pathological complex, in order to more fully and accurately reflect the pathology of breast cancer morphology and biology, many of the various classifications. In 1978 the National Forum for early diagnosis of breast cancer will be divided into non-invasive breast cancer, non-special-invasive cancer and special-invasive cancer three categories. In 1983 the National Breast Cancer Cooperative Group meeting pathological amendment of the existing classification of non-invasive cancer, early invasive cancer, a special type of invasive carcinoma, non-invasive carcinoma of the four special categories, the classification is more in line with pathological classification requirements.

Invasive cancer and non-invasive breast cancer is the histological classification, according to its morphological characteristics identified.
Non-invasive breast cancer known as carcinoma in situ, cancer cells confined to the basement membrane of mammary duct within the tumor, including lobular carcinoma in situ and ductal carcinoma. Such general breast cancer after complete resection good prognosis, not radiation or chemotherapy.
Invasive breast cancer refers to the extensive interstitial infiltration, various forms of cancer and stromal phase mixed picture. China will have special structure of invasive carcinoma classified as a special type cancer, papillary carcinoma, medullary carcinoma with a large number of lymphocytes, small duct carcinoma, adenoid cystic carcinoma, adenocarcinoma, sweat adenocarcinoma, squamous cell carcinoma, Paget's disease. Except in special type of cancer than other invasive cancer was invasive non-specific cancer, including invasive lobular carcinoma, invasive ductal carcinoma, only cancer, cancer hard, medullary carcinoma, adenocarcinoma, etc..
In general, non-invasive breast cancer prognosis of the best five-year survival rate of more than 90%, 10-year survival rates of 80% or more. Special-invasive cancer prognosis secondary, five-year survival rates of 70%, 10-year survival rate is about 60%. Invasive non-specific cancer prognosis relatively weaker, the five-year survival rate is about 60%, 10-year survival rate is about 40%. 