P5-23-04: Gonadotrophin-Releasing Hormone Analogues for Ovarian Function Preservation in Women with Premenopausal Breast Cancer Undergoing Adjuvant Chemotherapy: A Systematic Review and Meta-Analysis.

Abstract

Abstract Background: Breast cancer, the most common female malignancy, is also the most frequent tumor in women of reproductive age. Young women with breast cancer usually present adverse prognostic features and higher rates of recurrence when compared with their older counterparts. Adjuvant chemotherapy is usually recommended for this group of patients and premature ovarian failure (POF) is a potential complication. Material and Methods: We conducted a systematic search in MEDLINE, EMBASE, Cochrane Systematic Reviews databases and ***ClinicalTrials.gov from their inception until June 2011. The search was conducted to include published peer-reviewed studies on the issue of fertility preservation in women with breast cancer undergoing adjuvant chemotherapy. The search terms were tailored individually for each database to include the following Medical Subject Headings (MeSH) and text words: gonadotropin releasing hormone, breast neoplasms, drug therapy, premature ovarian failure and fertility. No language restriction was applied. We also searched for additional studies by reviewing the reference lists of retrieved articles, and studies presented in abstract form were also located in this manner. The main outcomes were return of spontaneous menstruation, ovulation and pregnancy rate. Results: We found 8 RCTs that met the inclusion criteria. Data were extracted from 3 RCTs. Data were only available for resumption of ovulation. There were no data available for markers of ovarian function, rate of ovulation and pregnancy. The rate of women with spontaneous menstruation demonstrated a statistically significant difference in favor of the use of GnRH-a (OR 3.11;95% CI, 2.04-472). Discussion: Use of GnRH concomitant to adjuvant chemotherapy in premenopausal breast cancer women aiming to reduce rates of POF has been subject of controversy during the last decade. Evidence from recently presented RCTs suggests there is a benefit of GnRH for ovarian function protection in this setting. Citation Information: Cancer Res 2011;71(24 Suppl):Abstract nr P5-23-04.