Skip to content

    Breast Cancer Health Center

    Font Size
    A
    A
    A

    Fewer Breast Cancer Patients Get Chemo

    Genetic Test Spares Thousands of Women From Misery and Cost of Chemotherapy
    By
    WebMD Health News
    Reviewed by Louise Chang, MD

    May 2, 2008 (New York City) -- Women with breast cancer are increasingly being spared the misery and cost of chemotherapy, thanks to a test that characterizes each tumor by its genetic thumbprint.

    Two new studies show that the test, known as Oncotype DX, significantly cut the number of women who got chemo.

    "It works and it works great. It has really changed the way we manage a substantial proportion of our breast cancer patients," says Susan K. Boolbol, MD, chief of breast surgery at Beth Israel Medical Center in New York City.

    Boolbol tells WebMD that after the diagnosis itself, "getting chemotherapy and losing their hair is the biggest concern" of women with breast cancer.

    The findings were presented at the American Society of Breast Surgeons (ASBS) Ninth Annual Meeting.

    Moving Away From One-Size Fits All

    The test is used to help guide the treatment of estrogen-fueled breast cancers that have not spread to the lymph nodes. Nearly half of the 182,000 invasive breast tumors that will be diagnosed in the U.S. this year fall into that category.

    In the past, about 90% of women with so-called estrogen-dependent, lymph-node negative breast cancer were given chemotherapy to reduce the odds of the cancer returning, says Nashville Breast Center's Pat Whitworth, MD, chairman of the board at the ASBS.

    "We couldn't identify who would benefit from treatment, so we had to treat everyone," he tells WebMD.

    Enter OncoType DX, which measures the activity of 21 genes that can raise breast cancer risk. Based on their activity, women are assigned a recurrence score: low, medium, or high risk of recurrence.

    Studies have shown that women who fall into the low-risk category gain little, if any, benefit from chemotherapy. Based on those studies, recently updated guidelines recommend that the test be incorporated into the care of some women with breast cancer.

    "It's really helping to individualize therapy," Whitworth says.

    Studies Show Test Spares Women From Chemo

    One study presented at the meeting involved 18 premenopausal and 60 postmenopausal women with estrogen-dependent, node-negative breast cancer.

    "Prior to Oncotype DX, 39 of the 78 women, or 50%, would have been given chemotherapy," says Leila C. Thanasoulis, MD, a fellow in surgical oncology at Bryn Mawr Hospital in Pennsylvania.

    With Oncotype DX, chemotherapy was recommended for only nine of the 78, or 12% of the women.

    The cost savings: nearly $7,000 per woman, Thanasoulis tells WebMD.

    The second study involved 66 women with estrogen-fueled tumors that hadn't spread to the lymph nodes.

    "The recurrence score influenced our treatment decision in 44% of them," says Juhi Asad, MD, a fellow in the department of surgery at St. Luke's-Roosevelt Hospital in New York City.

    Today on WebMD

    Breast Cancer Overview
    From mammograms to living after treatment.
    Dealing with breast cancer
    Get answers to your questions.
     
    woman having mammogram
    The 3 latest tips to know.
    woman undergoing breast cancer test
    Most abnormalities aren’t breast cancer.
     
    Resolved To Quit Smoking
    VIDEO
    Breast Cancer Treatments Improving
    Article
     
    Woman getting mammogram
    Article
    Screening Tests for Women
    Article
     
    serious woman
    Article
    Pink badge on woman chest to support breat cancer
    QUIZ
     
    what is your cancer risk
    Article
    breast cancer survivors
    Article