Breast Cancer—Patient Version - National Cancer Institute - breast tumer

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Breast cancer - Symptoms and causes - Mayo Clinic breast tumer


Although breast cancer is often referred to as one disease, there are many different types of breast cancer. All breast cancers start in the breast, so they are alike in some ways. Breast cancers differ in other ways. They can be non-invasive or invasive. Tumor cells can vary in location (milk ducts or lobules) and how they look under a microscope.

A tumor is a mass of abnormal tissue. There are two types of breast cancer tumors: those that are non-cancerous, or ‘benign’, and those that are cancerous, which are ‘malignant’. Benign Tumors. When a tumor is diagnosed as benign, doctors will usually leave it alone rather than remove it.

Breast cancer can develop in the ducts that carry milk to the nipple, the lobules that produce milk, or the tissue in between. Learn about the different types of breast cancer, including non-invasive, invasive, and metastatic breast cancers, and others. Ductal Carcinoma In Situ (DCIS) Invasive Ductal Carcinoma (IDC).

Aug 22, 2019 · A breast cancer tumor on a mammogram is often irregular with edges that don't look smooth. A spiculated breast mass, which has spikes extending out from the main mass, is often highly suggestive of cancer. In fact, the word cancer is derived from the appearance of these crab-like extensions that invade nearby tissues. The edges of the mass may also appear fuzzy or indistinct.