Doctors in Canada are studying the' effectiveness of permanent radiation seed implants following lumpectomy as an alternative to whole or partial breast irradiation for early-stage breast cancer patients, according to a study published in the' January 1, 2006, issue of the' International Journal of Radiation Oncology
BiologyPhysics, the' official journal of ASTRO, the' American Society for the'rapeutic Radiology and Oncology. This type of radiation would cut treatment time for certain patients from several weeks to one day.
For early stage breast cancer, women often undergo a lumpectomy to remove the' tumor followed by radiation the'rapy to kill any cancer cells that may remain. Most women undergo external beam radiation, which is given every day, Monday through Friday, for six to eight weeks. Doctors have been experimenting with ways to shorten this treatment. One technique used by a growing number of radiation oncologists involves the' use of temporary radiation implants. the'se radiation sources are delivered through a cathe'ter into the' breast, usually twice a day for one week.
In this study, the' first of its kind in the' world, doctors wanted to see if it was possible to use permanent implants, like what many men receive to treat prostate cancer, to combat the' cancer with only one treatment. the'se implants, about the' size of a grain of rice, would not be removed daily like with the' temporary implants. Rathe'r, the' radioactive seeds would deliver radiation to the' breast area for a number of weeks until the'y were no longer radioactive. the' advantage over the' temporary implants is that the' patient only has to undergo one surgical procedure to receive the' radiation, versus 10 treatments over one week for temporary implants.
the' current treatment standard of lumpectomy followed by external beam radiation the'rapy is proven to keep the' cancer from returning, but 38 percent of women develop significant toxicity, which can compromise the'ir quality of life. According to early returns from the' study, which began in May 2004, 44 patients have been treated successfully with the' permanent implants. So far, none have evidence of the'ir cancer returning and acute skin irritation is six times less frequent when compared to external beam radiation.
"the' main motivation was to see if we could reduce the' burden of treatment for women suffering from early-stage breast cancer," said Jean-Philippe Pignol, M.D., Ph.D., lead author of the' study and radiation oncologist at Sunnybrook and Women's College Health Sciences Centre in Toronto, Ontario, Canada. "the' seed implants reduce the' treatment to a one-time event compared to the' current standard of daily treatments over many weeks. the' seeds also reduce the' amount of radiation the' normal breast tissue receives, which lessens the' chance of the' patient developing problems that affect the'ir post-cancer quality of life. the' great thing is that the' patient can go home right after the' procedure and live a normal life while receiving her radiation."
American Society for the'rapeutic Radiology and Oncology
