This study evaluates endocrine therapy-induced alopecia among postmenopausal and premenopausal female patients with breast cancer. Alopecia is one of the most feared side effects of cancer-directed therapy, causing distress in women starting treatment for breast cancer. While alopecia is a well-known side effect of many chemotherapy drugs, it has also been reported by women undergoing endocrine therapy. Despite the frequent reports of alopecia related to endocrine therapy, hair loss is rarely reported as a side effect of endocrine therapy and the exact characterization of alopecia is not well understood. By having postmenopausal and premenopausal breast cancer patients describe their hair loss symptoms experienced while undergoing endocrine therapy, researchers may be able to better characterize the incidence, timing, duration, and severity of alopecia and whether the different types of endocrine therapy cause more or less trouble in this regard.

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.

Inclusion Criteria:

• Age >= 18 years

• Women with a diagnosis of breast cancer who are being treated with curative intent, with the one exception being women who are receiving CDK4/6 inhibitors (these patients being allowed to have more advanced disease)

• Provide informed consent

• Ability to complete questionnaire(s) by themselves or with assistance

• Filling into one of the 5 groups (understanding that groups will close once they complete their accrual goals of 30 patients)

• Willingness to complete questionnaires every 3 months

• Ability to complete the first questionnaire within 2 weeks of therapy initiation (for the four arms that are receiving adjuvant hormonal therapy)

  • For patients starting tamoxifen or an aromatase inhibitor: within 2 weeks of starting tamoxifen or aromatase inhibitor
  • For patients starting a CDK 4/6 inhibitor: within 2 weeks of starting the CDK 4/6 inhibitor (patients may have started an aromatase inhibitor at any time prior to initiation of CDK 4/6 inhibitor).

Exclusion Criteria:

• Verbal baseline alopecia >= 2 on an 11 point scale (from none = 0 to severe = 10). The question to use for this item is: Please rate your hair thinning or loss on a scale from 0 to 10, with 0 being no hair loss and 10 being complete hair loss
• Planned receipt of chemotherapy or another cancer-directed therapy concurrently (e.g., everolimus, etc.; note that a CDK4/6 inhibitor is allowed within cohort 3)
• Prior use of endocrine therapy for breast cancer
• Receipt of chemotherapy over the previous 6 months

Postmenopausal and premenopausal women with a diagnosis of breast cancer.