Ovarian Function Suppression with the Gonadotrophin-Releasing Hormone (GnRH) Analogue Goserelin in Premenopausal Advanced Breast Cancer

Goserelin is a gonadotrophin-releasing hormone (GnRH) analogue that induces the suppression of gonadal steroidogenesis, and it could therefore be a medical alternative to irreversible surgical castration. We report the clinical and endocrine results from 40 goserelin-treated premenopausal patients with advanced breast cancer.

A depot formulation of the drug (3.6 mg s.c.) was administered fortnightly for the first 4 doses, and monthly thereafter. Gonadotrophins and estradiol (E2) levels were measured before and at specific times during the treatment.

Objective responses were observed in 17 of the 38 evaluable patients (45%), six of whom achieved complete remission. The best responses were observed on soft tissues (65%). Castration E2 levels were achieved in all of the patients.

Our results confirm that goserelin is as effective as surgical oophorectomy in premenopausal advanced breast cancer.