Breast cancer isn’t a single disease. It’s made up of several subtypes. One of these subtypes is known as triple-negative breast cancer (TNBC). TNBC doesn’t grow in response to the hormones estrogen, progesterone, or HER2/neu.

Therefore, TNBC doesn’t respond to hormonal therapies that target the receptors of these hormones. For this type of breast cancer, targeted treatments aren’t available like other subtypes of breast cancer.

According to John’s Hopkins Breast Center, about 10 to 20 percent of those who receive a breast cancer diagnosis have the triple-negative subtype. TNBC grows rapidly. It also has a higher grade and tends to metastasize (spread).

Because the cancer grows quickly, it’s often discovered between mammograms. However, the fast growth rate means that standard chemotherapies have a good chance of inducing remission.

TNBC has a much better response to conventional chemotherapy than other breast cancer subtypes.

Recurrence is the return of breast cancer. It’s also sometimes called relapse. Breast cancer can return locally in breast or scar tissue, or distantly in other parts of the body, including bones or organs.

Cancer that occurs distantly is considered metastatic cancer. It’s very difficult to stop, although it’s not untreatable.

TNBC characteristically has a high recurrence rate, which is greatest within the first three years. However, it drops down sharply after five years. Therefore, there are no long post-therapy regimens.

This suggests a hidden benefit: a shortened treatment course. Women with early stage, slow-growing estrogen receptor-positive cancers are often in treatment for 10 years or more.

Breast Cancer Healthline is a free app for people that have faced a breast cancer diagnosis. The app is available on the App Store and Google Play. Download here.

Five-year survival tends to be lower with TNBC than other breast cancer types. This means that there’s a higher risk of death when the cancer does recur. According to, the five-year survival rate for TNBC is around 77 percent versus 93 percent for other breast cancer types.

A person’s survival rate depends on many factors. This includes the stage and grade of the cancer as well as your response to treatment. As with all cancers, it’s imperative to remember that each person’s outlook is unique. Statistics apply to a group, not to an individual.

TNBC occurs most often in:

  • premenopausal African-American women
  • women with an elevated hip-to-waist ratio
  • women who have had fewer children
  • women who haven’t breastfed, or breastfed for shortened lengths of time
  • younger women, before age 40 or 50
  • those with the BRCA1 mutation

TNBC can be treated with:

Emerging treatments, such as poly (ADP-ribose) polymerase (PARP) enzyme inhibitors are promising. If you receive a diagnosis of TNBC, you can also look into clinical trials for more treatment options.

The good news is that scientists are working hard to find more and better ways to treat TNBC.

It’s important to continue with a regular appointment schedule. Take charge of your health by eating properly and exercising. Meditation may also help you find emotional balance during this time.

A support group or therapy can help quell fears and provide you with tools to manage feelings of uncertainty.

Once the five years are over, TNBC cancer rarely relapses. A person can feel confident that they’ve been victorious over their cancer.

Find support from others who are living with breast cancer. Download Healthline’s free app here.