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Robotic surgery may improve outcomes in mouth and throat cancer: JAMA

Written By : Hina Zahid |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2020-08-21T09:00:17+05:30  |  Updated On 21 Aug 2020 12:29 PM IST
Robotic surgery may improve outcomes in mouth and throat cancer: JAMA
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LOS ANGELES - Robotic surgery for patients with early stage, oropharyngeal squamous cell cancer is associated with improved health outcomes, including better long-term survival, according to a Cedars-Sinai study published Thursday in JAMA Oncology. Oropharyngeal cancer occurs in the back of the throat and includes the base of the tongue and tonsils.

Transoral robotic surgery is a minimally invasive procedure in which a surgeon uses a computer-enhanced system to guide an endoscope - a flexible tube with a light and camera attached to it - to provide high-resolution, 3D images of the back of the mouth and throat, an area that is difficult to reach with conventional tools. Two robotically guided instruments, acting as a surgeon's arms, work around corners to safely remove tumors from surrounding tissue.

The Cedars-Sinai retrospective, observational study, which used data from the National Cancer Database, included 9,745 surgical patients - 2,694 of whom underwent transoral robotic surgery between 2010 and 2015. The authors found that the five-year overall survival rate for patients with early-stage disease who underwent robotic surgery was 84.5%, compared with 80.3% for patients who had non-robotic surgery, after adjusting for differences in health and other characteristics of the two patient groups.

"At a minimum, robotic surgery for oropharyngeal cancer patients seems safe and effective compared to what's been the standard of care for many years," said Zachary S. Zumsteg, MD, assistant professor of Radiation Oncology at Cedars-Sinai, referring to standard surgery, radiation therapy and chemotherapy. He is the study's senior and corresponding author. Anthony T. Nguyen, MD, PhD, a resident in the Department of Radiation Oncology at Cedars-Sinai, is the study's lead author.

Oropharyngeal cancer often is associated with the human papilloma virus, which is believed to cause 70% of oropharyngeal cancers in the United States, according to the Centers for Disease Control and Prevention. About 3,500 new cases of HPV-associated oropharyngeal cancers are diagnosed in women and about 15,500 in men each year in the U.S.

The Cedars-Sinai study observed that the proportion of patients undergoing transoral robotic surgery for early-stage oropharyngeal cancer increased dramatically after the U.S. Food and Drug Administration approved the surgery for that cancer in 2009 - from 18.3% in 2010 to 35.5% in 2015, according to the researchers' findings. Additionally, the proportion of facilities performing transoral robotic surgery during that same period more than doubled, from 6.3% to 13.9%.

The nationwide increase in transoral robotic surgery for oropharyngeal cancer prompted the investigators to assess whether the theoretical benefits of robotic surgery for oropharyngeal cancer patients actually provide outcomes that are superior or equivalent to the standard treatments for that cancer type and others.

In addition to increased overall survival rates, the researchers found that robotic surgery was associated with lower rates of positive surgical margins - 12.5% - compared with a rate of 20.3% for non-robotic surgery in patients with oropharyngeal cancer. Positive surgical margins refer to cancer cells that remain at the edge of tissue that has been surgically removed. Furthermore, robotic surgery was associated with less use of postoperative chemoradiation, at 28.6%, compared with 35.7% for patients who had non-robotic surgery.

"Our purpose in doing this study was to see how this new technology, which has never been tested in a randomized, controlled trial, has influenced patterns of treatment and outcomes since its FDA approval," Zumsteg said. "There is a learning curve with any new surgical technique, and new ones don't always translate into equal or improved outcomes."

Referring to their study results as "hypothesis-generating," the researchers hope it will inform future randomized, controlled clinical trials," Nguyen said.

"Meanwhile, it's reassuring to our patients that their survival rate is the same if not better with robotic surgery and they have the potential for a better quality of life," Nguyen said.

jama oncologyrobotic surgeryoropharyngeal cancerthroat cancertonsils
Source : JAMA Oncology
Hina Zahid
Hina Zahid

    Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

    Dr. Kamal Kant Kohli
    Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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