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    Breast Cancer Treated by Freezing Tumors

    Researchers Report Success in Using Cryotherapy to Treat Breast Cancer Patients
    By
    WebMD Health News
    Reviewed by Laura J. Martin, MD

    March 16, 2010 -- Breast cancer patients may one day be able to opt for a simple outpatient procedure to freeze their tumors as an alternative to surgery.

    In a small but promising study, researchers were able to kill breast cancer cells by freezing them using a technique known as image-guided, multiprobe cryotherapy.

    All 13 of the women who had the procedure were alive with no clinical evidence of cancer recurrence an average of 18 months, and up to five years, after having the procedure.

    Their tumors ranged in size from very small to very large.

    The study was presented at the Society of Interventional Radiology's 35th Annual Scientific Meeting in Tampa, Fla.

    Peter J. Littrup, MD, who pioneered cryotherapy close to two decades ago, says the findings show that even large breast tumors can be successfully treated with the nonsurgical freezing technique.

    Littrup directs imaging research and image-guided therapy at Detroit's Barbara Ann Karmanos Cancer.

    How Cryotherapy Works

    The cancer-killing freeze is achieved by delivering a very low temperature gas to the tumor using needle-like probes.

    Littrup tells WebMD that a single-probe freezing approach has been used for several years to treat breast cancer, but it is widely considered to be unsuitable for tumors larger than 1.5 centimeters.

    "We've been using multiple probes for many years to treat prostate cancer with a minimum of five probes," he says. "So it just made sense to me to try multiple probes for breast cancer."

    He adds that recent technological advances resulting in smaller and easier-to-manage probes and better ways to guide them to the tumor have made nonsurgical cryotherapy an attractive option for breast cancer.

    The 13 patients included in the study had a total of 25 tumors, ranging in size from 0.5 centimeters to 5.8 centimeters. The average tumor size was 1.7 centimeters.

    Using local anesthesia with mild sedation, an average of three probes per tumor were guided to the tumor site using either ultrasound alone or ultrasound with computed tomography (CT) imaging. The probes produced "ice balls" ranging in size from 2 centimeters to 10 centimeters, depending on the size of the targeted tumor.

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