Breast cancer occurs when breast cells become abnormal and divide without control or order. Breast cancer is the most common form of cancer among women in the United States. A mass or lump of extra tissue is called a tumor. It can be either benign or malignant. Benign tumors are not cancerous.
Malignant tumors are cancerous.
However, it is important to take care of your body now. Knowledge of familial history is also important. It is normal for your breasts to feel slightly lumpy or uneven. It is important to conduct self-examinations while you are young so that you know what your healthy breast feels like. Therefore, you will notice any irregularities at a later time.