Acute radiation dermatitis (ARD)—characterized by red, sore, itchy or peeling skin—affects up to 95% of people undergoing radiation treatment for cancer. Severe cases can cause significant swelling and painful skin ulcers that can severely impair quality of life, yet little is known about why this condition occurs and no standardized treatments for preventing severe ARD have been widely adapted. Courses of radiation therapy—routinely requiring daily treatments over several weeks—increase the risk for skin infection to occur.
Researchers at Montefiore Einstein Cancer Center (MECC) have found that many cases of ARD involve a common skin bacterium and that a simple, low-cost treatment can prevent severe cases, potentially setting a new standard of care for people undergoing radiation therapy. Their findings were reported in two papers published today in JAMA Oncology. Each year, 10 million people are treated with radiation therapy to reduce the size of their tumors.
“Until now, ARD was assumed to result simply from the skin being burned by the radiation, which meant that not much could be done to prevent it,” said Beth N. McLellan, M.D. director, supportive oncodermatology at Montefiore Einstein Cancer Center, chief of the division of dermatology at Montefiore Health System and Albert Einstein College of Medicine, and senior author of the two studies. “The readily available treatment we’ve developed and clinically tested could potentially save hundreds of thousands of people each year in the U.S. from severe ARD and its excruciating side effects.”
Identifying the Source
Staphylococcus aureus (SA) bacteria, often shortened to “staph,” typically live harmlessly on the skin, often in the nose and armpits. But, they can cause infections if the skin is broken by a cut. Radiation weakens the skin’s structure at the treatment site and can result in infection by allowing SA to break through the skin’s outer layer.
Since SA is implicated in common skin disorders that lead to a breakdown in the skin such as eczema, Dr. McLellan and her colleagues reasoned that the bacteria might also play a role in ARD. In one of the JAMA Oncology studies, the MECC researchers enrolled 76 patients undergoing radiation therapy for cancer. Bacterial cultures were collected from patients before and after radiation treatment, from three different body sites: inside the nose, from skin in the radiated area, and from skin on the side of the body not exposed to radiation.
SOURCE: PR Newswire