Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Radiofrequency, chemotherapy prove effective duo in destroying tumors

20.06.2003


New study presented today at Image-guided Therapies media briefing



Radiofrequency ablation (RFA) combined with chemotherapy is currently being used to treat malignant liver tumors at a Boston hospital on the basis of results from a new study appearing in the July issue of the journal Radiology. The minimally invasive, outpatient procedure is performed on primary liver cancer or colon cancer tumors that have spread to the liver of patients at Beth Israel Deaconess Medical Center.

"It’s exciting that a simple, image-guided technique, along with chemotherapy, can enhance the area of tumor killed," said Jonathan B. Kruskal, M.D., Ph.D., section chief of abdominal imaging at Beth Israel Deaconess and associate professor of radiology at Harvard Medical School in Boston. "Our research shows that we are now able to treat larger tumors with this combined therapy."


RFA uses heat to destroy malignant tumors. After sedating the patient, radiologists locate the tumor with computed tomography (CT) or magnetic resonance (MR) imaging. A four- to 10-inch-long electrode, similar to a biopsy needle, is guided into the center of a tumor via imaging.

The electrode delivers radiofrequency current to heat and destroy the tumor tissue.

Dr. Kruskal co-authored the Radiology study, which indicated that with the addition of chemotherapy, tumors larger than five centimeters can be treated with RFA and that partially destroying tumors with RFA slows tumor growth and improves survival.

"Large tumors are typically not considered amenable to RFA treatment. Our results suggest that they may well be," he said.

The research, performed by Guiseppe D’Ippolito, M.D., and colleagues under the direction of S. Nahum Goldberg, M.D., the senior author of the study, was the first randomized controlled study on combined RFA and chemotherapy treatments in animals. Dr. Kruskal presented it today during a Radiological Society of North America (RSNA) media briefing on image-guided therapies.

Liposomal doxorubicin (a chemotherapeutic agent) and RFA were used to treat breast tumors implanted into 49 rats and grown from 10 days to two weeks. The animals were divided into four treatment groups: RFA only, doxorubicin only, RFA combined with doxorubicin, and a control group receiving no treatment.

Doxorubicin is dispensed in fat droplets, which circulate through the body and find the tumor, helping to destroy it. When doxorubicin was combined with RFA, results showed a reduction in tumor growth rates and a tripling in the average survival rate compared with the group receiving no treatment.

"The survival of animals increased from nine days in the control group to 27 days with the combined therapy," Dr. Kruskal said. "This study opens up the possibilities of using other drug cocktails with RFA to kill tumors and to treat tumors outside of the liver." RFA is a good option for treating liver tumors. Many people with liver tumors are not appropriate candidates for surgery because their tumors are too widespread or inaccessible or because of their poor physical health. They also may not be candidates for a liver transplant.

A liver tumor can be ablated with radiofrequency in about 30 to 60 minutes, without affecting the liver’s normal tissue. RFA is a one- to three-hour outpatient procedure that can be used to treat recurrent liver tumors. It is less risky than surgery, can be performed without general anesthesia and causes minimal discomfort. Patients can most often go home the same day.

Risks associated with RFA include bleeding and injury to other organs and "post-ablation" syndrome, which includes flu-like symptoms.

Beth Israel Deaconess is currently the only hospital providing combined RFA and liposomal chemotherapy, according to Dr. Kruskal. Approximately 25 patients have been treated with the combined therapy by Dr. Goldberg, director of the tumor ablation program at Beth Israel Deaconess, and they are seeing a 25 percent increase in the volume of tumor destruction. Based on these results, Drs. Goldberg and Kruskal are planning further studies, including a large clinical study comparing RFA alone to RFA combined with liposomal chemotherapy.

"RFA has been used worldwide for the last five or six years to treat tumors up to five centimeters," Dr. Kruskal said. "With the new combined therapy, where patients are given doxorubicin intravenously prior to the start of RFA, physicians will be able to treat larger tumors, up to eight centimeters."

The purpose of this study, partly funded by the National Cancer Institute and the National Institutes of Health, was to determine whether combined intravenous liposomal doxorubicin and RFA decreased tumor growth and increased endpoint survival – that is, from the start of treatment until the tumor reached three centimeters.

Following treatment, tumors were measured every two to three days until they reached three centimeters. The rats that received RFA and doxorubicin had a mean endpoint survival of 27 days. Rats receiving either RFA or injections of doxorubicin had an endpoint survival of 16 days. The control group, with no treatment, reached endpoint survival at 10 days.

Maureen Morley | EurekAlert!
Further information:
http://radiology.rsnajnls.org
http://www.RadiologyInfo.org.

More articles from Studies and Analyses:

nachricht Researchers simplify tiny structures' construction drip by drip
12.11.2018 | Princeton University, Engineering School

nachricht Mandibular movement monitoring may help improve oral sleep apnea devices
06.11.2018 | Elsevier

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A Leap Into Quantum Technology

Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.

In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...

Im Focus: Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.

Im Focus: Penn engineers develop ultrathin, ultralight 'nanocardboard'

When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure

Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...

Im Focus: Coping with errors in the quantum age

Physicists at ETH Zurich demonstrate how errors that occur during the manipulation of quantum system can be monitored and corrected on the fly

The field of quantum computation has seen tremendous progress in recent years. Bit by bit, quantum devices start to challenge conventional computers, at least...

Im Focus: Nanorobots propel through the eye

Scientists developed specially coated nanometer-sized vehicles that can be actively moved through dense tissue like the vitreous of the eye. So far, the transport of nano-vehicles has only been demonstrated in model systems or biological fluids, but not in real tissue. The work was published in the journal Science Advances and constitutes one step further towards nanorobots becoming minimally-invasive tools for precisely delivering medicine to where it is needed.

Researchers of the “Micro, Nano and Molecular Systems” Lab at the Max Planck Institute for Intelligent Systems in Stuttgart, together with an international...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“3rd Conference on Laser Polishing – LaP 2018” Attracts International Experts and Users

09.11.2018 | Event News

On the brain’s ability to find the right direction

06.11.2018 | Event News

European Space Talks: Weltraumschrott – eine Gefahr für die Gesellschaft?

23.10.2018 | Event News

 
Latest News

In focus: Peptides, the “little brothers and sisters” of proteins

12.11.2018 | Life Sciences

Materials scientist creates fabric alternative to batteries for wearable devices

12.11.2018 | Materials Sciences

A two-atom quantum duet

12.11.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>