Updated 12 October 2016

'Freeze therapy' – an alternative cancer treatment?

In cryoablation a doctor guides a thin, needle-like probe into the tumour. There, the probe emits liquid nitrogen, which creates an ice ball that freezes the tissue.


A freezing technique known as cryoablation might be a viable alternative to lumpectomy for treating small, early stage breast cancers, researchers report.

Minimally invasive

In the small study of 86 patients, "cryoablation was shown to successfully [treat] the majority of small breast cancers with few side effects or complications," said study co-author Dr Deanna Attai. She's an assistant clinical professor of surgery at the University of California, Los Angeles David Geffen School of Medicine.

Using this minimally invasive approach to destroy cancer cells, there should be little to no change in the appearance of the breast, said Attai, immediate past president of the American Society of Breast Surgeons.

The major risk, Attai said, is not killing all the cancerous cells.

Read: Kill cancer cells, not healthy ones

Another surgeon noted that although further research is still needed, cryoablation appears to be "a potential new tool that we can offer women".

"This is promising data. It's the first step," said Dr Laura Kruper, chief of the breast surgery service at the City of Hope Cancer Centre in Duarte, California. However, "it's certainly not going to be for everyone," she added.

For one thing, "the tumour can only be about a centimetre," Kruper said. That's less than half an inch.

Less than a centimetre

The freezing technique has been used for years to treat cancers of the liver, lung and kidney, as well as noncancerous breast tumours, Attai and her colleagues said.

For the new study, the researchers performed the freezing technique on breast cancer patients in 19 centres across the United States. The tumours had to be 2 cm (about three-quarters of an inch) or smaller.

Because the study was designed to assess the technique's effectiveness in advance of government approval, the researchers surgically removed the tumours 28 days after the extreme-cold treatment. Then they examined the tissue in a pathology lab.

Overall, freezing was successful for 92 percent of the cancers. And it worked for all tumours measuring less than 1 centimetre, the study found.

Read: New drug slows growth of breast cancer tumours

The outpatient procedure is done with local anaesthesia. A doctor uses ultrasound imaging to help guide a thin, needle-like probe into the tumours. There, the probe emits liquid nitrogen, which creates an ice ball that freezes the tissue, Attai said. The nitrogen doesn't touch the tissue, she said.

Afterward, the body gradually reabsorbs the "dead" tissue, said Attai, who added that the residual scar is small.

Long-term data needed

Potential complications of cryoablation include infection, bleeding, cold damage to the skin, pain and scarring, Attai said. To prevent cold damage, tumours close to the skin surface should not be treated in this way, she said.

Some of the patients in the study told Attai they would have preferred to skip the surgery that followed cryoablation. However, she said a subset of patients probably would feel more comfortable with traditional surgery.

It could be years before the approach might be recommended for standard practice, Attai said.

"We know cryoablation will kill small tumours. In order to truly compare with lumpectomy, we need a study where the patients undergo ablation and then are not treated with surgery," Attai said.

Read: Breast conserving therapy best for some

"We need to follow them for at least five years to determine if recurrence rates are higher with ablation alone," she explained.

Also yet to be decided is if radiation therapy would be needed after the cryoablation, Attai said.

City of Hope also plans to research the technique further, said Kruper, who wasn't involved in the current study.

"We need more long-term data," she agreed.

The study was published recently in the Annals of Surgical Oncology.

Read more:

Low-dose chemo may keep cancer under control

New device electrifies brain cancer cells

High-tech glasses may help surgeons see cancer

Copyright © 2016 HealthDay. All rights reserved.


Ask the Expert

Cancer expert

CANSA’s purpose is to lead the fight against cancer in South Africa. Its mission is to be the preferred non-profit organisation that enables research, educates the public and provides support to all people affected by cancer. Questions are answered by CANSA’s Head of Health Professor Michael Herbst and Head of Advocacy Magdalene Seguin. For more information, visit

Still have a question?

Get free advice from our panel of experts

The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.

* You must accept our condition

Forum Rules