American College Of Surgeons - Inspiring Quality: Highest Standards, Better Outcomes

Non-Invasive Breast Cancers

Non-invasive cancer cells are found in the lobules or ducts. They have not moved to the lymph nodes or spread beyond the breast tissue.

Ductal Carcinoma in Situ

In Ductal Carcinoma in Situ (DCIS), your tumor is in the milk ducts. Symptoms can include a lump in your breast, changes in your breast size or color, and breast skin dimpling or puckering. About 83 percent of in situ breast cancer is DCIS.4

All women with DCIS are referred for treatment. Treatment includes surgery, radiation, and/or endocrine (hormonal) therapy. About 50 percent, or one-half, of all cases will become an invasive breast cancer (IBC) if not treated.5

Breast Cancer Ductal Carcinoma

Breast Cancer Ductal Carcinoma

Paget's Disease of the Breast

Paget's disease is a rare form of in situ breast cancer that involves the skin of your nipple and areola (dark skin around your nipple).

Symptoms include:

  • Itching, tingling, redness, or change in shape of your nipple and/or areola
  • Flaking, crusty, or thickened skin on or around your nipple
  • Discharge (sometimes yellow or bloody) from your nipple

Paget's disease represents about 3 percent of breast cancer and may be seen in women and men.6

“Inverted Nipple” by Karin4758, licensed under CC BY-SA 3.01

Keeping You Informed

Lobular carcinoma in situ (LCIS) is not cancer. It is a risk factor (or marker) for invasive breast cancer. About 13 percent of in situ breast disease is LCIS.7

The risk of LCIS turning into invasive breast cancer is about 1 percent per year. It can occur in either breast.8

Treatment may include monitoring, surgery, or hormone therapy. Hormone drugs like tamoxifen (Nolvadex®), raloxifene (Evista®), or exemestane (Aromasin®) are used to prevent breast cancer.