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Invasive ductal carcinoma Larger Version
Invasive ductal carcinoma (IDC), sometimes called infiltrating ductal carcinoma, is the most common type of breast cancer. About 80% of all breast cancers are invasive ductal carcinomas.
Invasive means that the cancer has “invaded” or spread to the surrounding breast tissues. Ductal means that the cancer began in the milk ducts, which are the “pipes” that carry milk from the milk-producing lobules to the nipple. Carcinoma refers to any cancer that begins in the skin or other tissues that cover internal organs — such as breast tissue. All together, “invasive ductal carcinoma” refers to cancer that has broken through the wall of the milk duct and begun to invade the tissues of the breast. Over time, invasive ductal carcinoma can spread to the lymph nodes and possibly to other areas of the body.
According to the American Cancer Society, more than 180,000 women in the United States find out they have invasive breast cancer each year. Most of them ...
There are some types of invasive ductal carcinoma that happen less commonly than others. In these cancers, the cells can look and behave somewhat differently than invasive ductal carcinoma cells usually do. If you’re diagnosed with one of these cancers, talk with your doctor about how this could affect your treatment plan. You can read more about these cancers on the following pages:
Tubular Carcinoma of the Breast
Medullary Carcinoma of the Breast
Mucinous Carcinoma of the Breast
Papillary Carcinoma of the Breast
Cribriform Carcinoma of the Breast
The medical experts for Less Common Subtypes of Invasive Ductal Carcinoma are:
Jennifer J. Griggs, M.D., medical oncologist/hematologist, Division of Hematology/Oncology at the University of Michigan, Ann Arbor, MI
Clifford Hudis, M.D., Chief, Breast Cancer Medicine Service, Memorial Sloan-Kettering Cancer Center, New York, NY
These experts are members of the Breastcancer.org Professional Advisory Board , including more than 70 medical e...
Q. I’ve heard of women with DCIS and IDC, but I just found out I have ILC. What’s that? A. ILC–infiltrating lobular carcinoma–is similar to IDC (infiltrating ductal carcinoma), and the two are usually paired when you’re reading about types of breast cancer. The main difference involves geography: IDC occurs in your breast’s ducts, the tiny tubes that carry milk from where it’s manufactured–in the lobules–to your nipple. ILC occurs in–you guessed it–those milk-manufacturing lobules. Here’s what’s going on: atypical cells–cells that, for an unknown reason, mutated as they grew–have collected in the lobules in your breast. At some point, these atypical cells broke through the lobule wall, and started moving into the surrounding tissue. This is when your cancer crossed the line from LCIS–lobular carcinoma in situ–to invasive (infiltrating) lobular carcinoma–ILC. While most breast canc...
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