Endocrine Therapy-Induced Alopecia in Postmenopausal and Premenopausal Female Breast Cancer Patients

PRIMARY OBJECTIVE: I. To describe the incidence, characteristics, and severity of alopecia related to endocrine therapy in four cohorts of postmenopausal women who have had a diagnosis of breast cancer: patients undergoing endocrine therapy with tamoxifen, patients undergoing endocrine therapy with an aromatase inhibitor, patients undergoing therapy with an aromatase inhibitor in addition to a CDK4/6 inhibitor, and patients not receiving endocrine therapy. A fifth cohort has met the accrual goal and is no longer enrolling: premenopausal women receiving any type of endocrine therapy. SECONDARY OBJECTIVE: I. To investigate the difference in incidence, characteristics, and severity of alopecia between the aforementioned five cohorts of patients. OUTLINE: This is an observational study. Patients complete alopecia questionnaires and surveys and have medical records reviewed on study.