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Cancer Health Center

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Heat Therapy Fights Soft-Tissue Tumors

Study Shows Targeted Heat Therapy Lowers Risk of Recurrence of Soft-Tissue Sarcomas
WebMD Health News
Reviewed by Louise Chang, MD

Sept. 23, 2009 (Berlin) -- Tumors in soft tissues such as muscle, fat, and nerves around the joints are much less likely to come back if they are heated at the time patients receive chemotherapy, a study shows.

There's also a suggestion that patients who receive targeted heat therapy may live longer, says the study's leader, Rolf Issels, MD, a professor of medical oncology at Klinikum Grosshadern Medical Center at the University of Munich.

"These findings provide a new standard treatment option and we believe they are likely to change the way many specialists treat these tumors," he tells WebMD.

The results were presented at a joint meeting of the European Cancer Organization and the European Society of Medical Oncology.

Soft tissue sarcomas involve tumors that start in the soft, supporting tissues of the body, such as muscle, fat, blood vessels, nerves, tendons, tissue around the joints, and deep layers of the skin. They are relatively rare, accounting for about 3% of all cancers, but are more common in children and young adults.

Surgery is the primary treatment, but the tumors are difficult to remove, so radiation and/or chemotherapy are often given to kill lingering cancer cells.

However, the benefits of chemotherapy have been shown to be limited, Issels says, and high-risk patients often relapse within two or three years.

Targeted Heat Therapy: How It Works

That's where targeted heat therapy comes in. The technique, known as regional hyperthermia, uses focused electromagnetic energy to warm the tissue in and around the tumor to between 104 and 109.4 degrees Fahrenheit.

The heat packs a four-pronged attack against the tumor, says Gerard C. van Rhoon, PhD, head of the hyperthermia unit at Erasmus University Medical Center in Rotterdam, Netherlands.

First, it directly kills cancer cells, he says. It also improves blood flow, which allows more chemotherapy to get through to the area of the tumor.

The improved blood flow also brings more oxygen to the tumor, which makes it more sensitive to radiation. Finally, the heat interferes with cancer cells' repair mechanisms and they die off, van Rhoon tells WebMD.

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