Abstract: Methods for reducing the progression of ER+breast cancer in a patient are provided, the methods comprising administering to the patient an effective amount of lasofoxifene or a pharmaceutically acceptable salt thereof and an effective amount of a CDK4/6 inhibitor (CDK4/6i), wherein the breast cancer: (i) is estrogen receptor positive (ER+); (ii) has at least one gain of function missense mutation within the ligand binding domain (LBD) of the Estrogen Receptor 1 (ESR1) gene; and (iii) has progressed during prior CDK4/6 inhibitor therapy and/or has an oncogenic mutation in a gene other than ESR1.

Abstract: Methods for reducing the progression of ER+ breast cancer in a patient are provided, the methods comprising administering to the patient an effective amount of lasofoxifene or a pharmaceutically acceptable salt thereof and an effective amount of a CDK4/6 inhibitor (CDK4/6i), wherein the breast cancer: (i) is estrogen receptor positive (ER+); (ii) has at least one gain of function missense mutation within the ligand binding domain (LBD) of the Estrogen Receptor 1 (ESR1) gene; and (iii) has progressed during prior CDK4/6 inhibitor therapy and/or has an oncogenic mutation in a gene other than ESR1.

Abstract: The disclosure provides methods for treating vulvovaginal atrophy (VVA) and osteoporosis in breast cancer survivors and survivors of other malignancies with an effective amount of lasofoxifene, a pharmaceutically acceptable salt thereof, or a prodrug thereof.

Abstract: The disclosure provides methods for treating vulvovaginal atrophy (WA) and osteoporosis in breast cancer survivors and survivors of other malignancies with an effective amount of lasofoxifene, a pharmaceutically acceptable salt thereof, or a prodrug thereof.