Supplemental radiation therapy beneficial for stage I endometrial cancer

Women with stage I endometrial cancer (with grade 1 and grades 3 and 4 disease) who receive radiation therapy in addition to other treatment have improved survival rates, according to a study in the January 25 issue of JAMA.

Endometrial cancer remains the most common gynecological malignancy in the United States, according to background information in the article. However, the optimal supplemental treatment for stage I endometrial cancer remains uncertain.

Christopher M. Lee, M.D., of Huntsman Cancer Hospital and University of Utah Medical Center, Salt Lake City and colleagues conducted a study to quantitatively evaluate the frequency and effect of adjuvant (supplemental) radiation therapy (RT) on overall and relative survival for women with stage I endometrial cancer. The study included 21,249 patients with American Joint Committee on Cancer stage IA-C node-negative endometrial cancer. The researchers used data from the Surveillance, Epidemiology, and End Results Program of the U.S. National Cancer Institute, from January 1, 1988, to December 31, 2001.

Of the 21,249 women, 4,080 received adjuvant RT (19.2 percent) and 17,169 did not receive adjuvant RT (80.8 percent). Adjuvant RT significantly improved overall survival for patients with stage IC/grade 1 and stage IC/grades 3 and 4 disease. Further analysis revealed a statistically detectable association of adjuvant RT with improved relative survival in patients with stage IC/grade 1 (56 percent lower rate of death) and stage IC/grades 3 and 4 (28 percent lower rate of death).

"As the largest reported population analysis to our knowledge of adjuvant RT in early stage endometrial adenocarcinoma to date, it is significant that our study reveals a benefit for improved overall and relative survival for adjuvant RT in stage IC/grade 1 and stage IC/grades 3 and 4 disease. This information should be added to previous articles in the literature that confirm beneficial effects of adjuvant R

Contact: Linda Aagard
JAMA and Archives Journals

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