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8 Things You Need to Know About De Novo Metastatic Breast Cancer

The diagnosis sounds frightening: De novo metastatic breast cancer, or breast cancer that, when detected, is stage 4 and has already spread to another part of the body — most likely the bones, lungs, liver, or brain. Approximately 6 to 10 percent of women will get this news upon their breast cancer diagnosis.

While it may sound terrifying, however, there is hope.

“This isn’t an immediate death sentence,” says Stephen Malamud, MD, a medical oncologist and regional director of medical oncology at Nuvance Health Systems in Poughkeepsie, New York. “You’re not terminal. We’re going to be treating you — for years, in many cases.”

The development of new therapies that target a cancer’s specific characteristics has particularly improved the outlook for people diagnosed with de novo metastatic breast cancer (MBC), said Tiffany Onger, MD, a breast medical oncologist at Cleveland Clinic. According to a study looking at changes in survival over time in women with de novo MBC, the five-year overall survival rate improved from 33 percent for people diagnosed between 1995 and 1999 to 43 percent in women diagnosed between 2015 and 2017.

Some studies, in fact, have found that de novo MBC has a better prognosis than recurrent metastatic breast cancer (breast cancer that is diagnosed at an early stage and later spreads, or becomes metastatic), possibly because a higher proportion of cases of de novo MBC is HER2-positive (HER2+), a subtype for which there are many very effective treatments.

“So with the bad news,” Dr. Onger says, “there’s good news — and empowering information.”

Here is what else you need to know if you’ve been diagnosed with de novo metastatic breast cancer.


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