Breast cancer is a type of cancer that starts in the cells of the breast. It occurs when abnormal cells in the breast grow and divide uncontrollably, forming a lump or mass. Breast cancer can develop in both men and women, but it is more common in women.
There are several types of breast cancer, but the most common type is invasive ductal carcinoma, which starts in the milk ducts and spreads to other parts of the breast. Other less common types include invasive lobular carcinoma, inflammatory breast cancer, and Paget's disease of the nipple.
Breast cancer can cause a variety of symptoms, including a lump or thickening in the breast, changes in the shape or size of the breast, nipple discharge, and skin changes around the breast or nipple. However, many people with breast cancer have no symptoms at all.
Early detection is important for the successful treatment of breast cancer. Women are advised to perform breast self-exams regularly and to have regular mammograms, particularly as they get older or if the