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Cervical Cancer Health Center

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Futuristic Microwave May Treat Cervical Cancer

Microwave Hyperthermia Could Add Power to Chemo/Radiation Treatment

Advancing Technology

The newer microwave machine used in the current study is more advanced, says Paul Turner, chief technical officer for device maker BSD Medical Corp.

"It lets us focus energy from many antennas positioned around the body, so we can direct the energy in a noninvasive way to any body part," Turner tells WebMD. "We can reach deep into the pelvis and even into the thorax."

In a major clinical trial, the device already showed that it can greatly improve radiation therapy. But chemotherapy improves radiation therapy just as well. And chemotherapy has the added advantage of reaching throughout the body to hit cancer cells that may have wandered far from the original tumor site.

That's why chemoradiation is the standard of care for advanced cervical cancer, Koh says. It's also why the makers of the microwave device have turned their attention to seeing if microwave hyperthermia makes chemoradiation more effective.

"We are combining all three to give a super therapy a major punch," Turner says.

Big Test Already Under Way

Is it going to work? The current study shows that it might. Most patients tolerated the triple treatment well. But it wasn't easy. The most common side effects were white-blood cell anemia (leukopenia), fatigue, nausea, vomiting, and diarrhea.

The microwave caused pain in five patients, very slight burns in 12 patients, and mild signs of a worrisome side effect called subcutaneous fatty necrosis. None of these side effects was serious enough to cause doctors to withhold the treatment.

But chemotherapy and radiation are famously difficult to endure. Will adding hyperthermia be worth the effort for patients?

"I would worry about patients," Koh says. "With chemo and radiotherapy you are already pushing people to what would be considered the limits of tolerance. ... My concern is if you add hyperthermia, they may go beyond the limits of patient tolerance."

But Koh quickly adds that if hyperthermia makes treatment more effective, it would certainly be worth it.

"With chemoradiation, at least 20% of patients have continued cancer spread in the pelvis or the tumor comes back at the primary site," he says. "The promise of hyperthermia is that it might improve pelvic control and reduce the overall remission rate. If this study holds true, this is worth testing."

Tests already are under way. An international clinical trial is randomly assigning 400 cervical cancer patients to either chemoradiation or chemoradiation plus microwave hyperthermia.

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