Types of Breast Cancer
Invasive Vs. Noninvasive Breast Cancer
Noninvasive Breast Cancer-
- Abnormal cells contained to the breast's milk ducts.
- Cancer is unable to spread to surrounding tissues or other areas of body.
Invasive Breast Cancer –
- Cancer is able to spread into surrounding tissues and other areas of the body.
Ductal Carcinoma in Situ (DCIS)
- Most common type of noninvasive breast cancer.
- Found in and confined to the milk ducts.
- Classified as low, intermediate or high grade.
- A low grade DCIS would resemble normal, healthy breast cells the closest.
Invasive Ductal Carcinoma (IDC)
- Most common form of breast cancer.
- Begins in the milk ducts and spreads to surrounding tissue.
Invasive Lobular Carcinoma (ILC)
- Second most common form of invasive breast cancer.
- Begins in the breast's lobules and spreads to surrounding tissue.
- Doesn't always form a lump, but could form an abnormal thick or full area in the breast.
Inflammatory Breast Cancer
- Less common form of breast cancer, making up 2-4% of all breast cancer diagnoses in the United States.
- An aggressive disease in which cancer cells block lymph vessels in skin and soft tissue.
- Classified by receptor, more commonly triple-negative or HER2- positive than non-inflammatory breast cancer.
Metaplastic Breast Cancer
- Rare form of breast cancer, making up less than 1% of all breast cancer diagnoses.
- This aggressive disease is often difficult to treat successfully.
- Often identified by a distinct, fast growing lump in breast.
Male Breast Cancer
- Each year around 2000 men in the United States are diagnosed with breast cancer.
- Treatments and classification is essentially the same as female breast cancer.
Advanced/Metastatic Breast Cancer
- Advanced form of breast cancer, also known as stage IV breast cancer.
- Any breast cancer that has spread beyond the breast and lymph nodes to other areas of the body, such as bones, liver, lungs or brain.
- Most advanced breast cancer cases are not considered curable, and are treated like a chronic illness.
Three major receptor sub-types often impact a patient's treatment plan.
- HER2 Positive Breast Cancer
- Hormone Receptor Positive/ER - Positive Breast Cancer
- Triple-Negative Breast Cancer
Want to know more? Visit these online sources to learn more about types of breast cancers and their receptors.
Memorial Sloan Kettering Cancer Center
MD Anderson Cancer Center