Background delivering a radiofrequency source into the uterine cavity WORLD JOURNAL OF SURGICAL ONCOLOGY

gynecological disease, affecting 19 % of women of child-bearing age and perimenopausal women [1,2]. The treat-ment options usually include drugs or surgery, both of which have significant disadvantages such as recurrence of the symptoms and dysfunctional uterus [2-5]. How to improve the efficacy of minimally-invasive surgery has become a widely-recognized concern [6,7]. Radiofrequency endometrial ablation (REA) is a minimally-invasive tech-nique recently developed in gynecology [8-12]. After a thermal effect (approximately 60-85°C) is produced which causes thermocoagulation, denaturation, and necro-sis of endometrial tissue, as well as peripheral vascular thrombosis, which stops the bleeding [12]. There were histopathological studies on the treatment of menorrhagia using thermocoagulation endometrial