Different local estrogen therapies for a tailored approach to GSM

Local estrogen therapy (LET) is the mainstay of treatment for vaginal dryness, dyspareunia and other urogenital symptoms because it may reverse some pathophysiological mechanisms associated with decreasing endocrine function and increasing aging. Over the years, several vaginal products including different formulations (tablets, rings, capsules, pessaries, creams, gels and ovules) and molecules (estradiol [E2], estriol [E3], promestriene, conjugated equine estrogens and estrone) have been used with superimposable therapeutic results. Low-dose and ultra-low-dose LET is the gold standard due to its minimal systemic absorption, with circulating E2 levels persistently remaining in the postmenopausal range. In healthy postmenopausal women, preference among the various products is presently the main driver and dissatisfaction with LET seems high, namely because of the delayed use in those with severe symptoms of genitourinary syndrome of menopause (GSM). Specific concerns remain in high-risk populations such as breast cancer survivors (BCS), especially those under treatment with aromatase inhibitors. Based on the multitude of symptoms under the umbrella of GSM definition, which includes vulvovaginal atrophy (VVA), it is mandatory to investigate specific effects of LET on quality of life, sexual function and genitourinary conditions by conducting studies with a patient-tailored focus.