Genitourinary syndrome of menopause in patients with breast cancer treated by hormonotherapy: women's perception in ITAC, a French web-based survey.

GUSM remains underdiagnosed and underestimated in BC survivors who receive HT, although it is among most frequent and disabling side effects of HT. Awareness should be increased among physicians, along with information to women. Early detection and treatment of symptoms and prophylaxis of GUSM in at-risk women should be implemented.