Breast cancer is a disease in which breast cells become uncontrollable. There are different types of breast cancer. The type of breast cancer depends on which breast cells turn into cancer. Breast cancer can develop in different locations of the breast. The breast is made up of three main parts: labels, ducts, and connective tissue. Lobules are glands that produce milk. Drains are taps that carry milk to the nipple. Connective tissue consists of fatty tissue and it surrounds and connects other tissues. Most breast cancers begin in ducts or lobules.

Breast cancer can spread when cancer cells enter the blood or lymph system and then move to other parts of the body. The lymphatic system is actually part of the body's immune system. it is a network of lymph nodes (small, bean-shaped glands), ducts or vessels and organs that work together to collect and carry clear lymph fluid through body tissue. The clear lymph fluid inside the lymph ducts contains tissue by-products and waste materials as well as immune system cells. Lymph drains take lymph fluid away from the breast. In case of breast cancer, cancer cells can enter these lymph vessels and start growing into lymph nodes.

Breast cancer arises as a result of genetic mutations or DNA damage. They may be related to estrogen, inherited genetic defects, or exposure to a trusted source of inherited genes that can cause cancer, such as brca1 and brca2 genes. Breast cancer usually begins with the inner layer of the milk ducts or the labels that provide them with milk. Then it can be transferred to parts of the body.

Breast cancer is often divided into: non-invasive breast cancer (carcinoma in the ceto) - found in the breast ducts (ductal carcinoma in the ceto, or dcis) that does not spread to the breast tissue around the ducts. Non-invasive breast cancer is commonly found during the mammogram and rarely appears as a breast lump. Invasive breast cancer - where cancer cells spread through the lining of the ducts to the surrounding tissue of the breast. Invasive type of breast cancer is too common.

There may be several symptoms of breast cancer, but the first significant symptom is usually thickening or lumping of breast tissue. Most breast lumps are not cancerous, but it is always better to be examined by a doctor. Self examination is crucial so, always be careful about any nodule or lump.

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