Influence of the Aromatase Inhibitor Anastrozole and GnRH Analog Goserelin Acetate as Preoperative Treatment of Vaginal Surgical Treatment of Uterine Leiomyoma: Analysis of Intra and Immediate/Late Postoperative Patterns

Uterine leiomyoma is the most prevalent benign gynecologic tumor in women. Standard treatment is surgical (hysterectomy or myomectomy), and depends of many variables. If these tumors are large, preoperative assessment with clinical treatment may be useful in order to decrease its volume, improve hematologic patterns and modify surgical approach (vaginal or abdominal). It is well know that GnRH analogs can cause these goals; however, aromatase inhibitors are new promising drugs which are being used for reducing uterine leiomyoma's volume and few observational studies have shown this fact. The investigators are aiming to compare both treatments in a randomized controlled trial and see if it both treatments are similar or not in decreasing uterine leiomyoma's volume, influencing operative time, blood loss during surgery.