Fatigue Caused by Chemotherapy in Women Who Have Undergone Surgery for Breast Cancer and in Healthy Volunteers

OBJECTIVES:

To assess treatment-related fatigue, cognitive dysfunction, and recovery in women undergoing adjuvant chemotherapy for stage I-III breast cancer as compared with a patient-selected control population.
To determine whether fatigue induced by sustained isometric contraction (SIC) is more of central or peripheral (muscular) origin in patients with and without treatment-related fatigue.
To characterize changes from baseline in potential abnormal signal processing in the brain while performing cognitive-assessment testing (CAT) in patients experiencing chemotherapy-related cognitive dysfunction compared with the controls.

OUTLINE: Patients and participants undergo assessment of treatment-related fatigue and cognitive dysfunction (i.e., mental fatigue) at baseline, after completion of 3-4 courses of standard adjuvant chemotherapy, and 1-3 weeks after completion of the most recent treatment. Patient recovery will be assessed at approximately 1 year from baseline. Study assessments will include a brief fatigue inventory, a cognitive assessment, and muscle fatigability testing through a sustained isometric contraction. Additional assessments will include quantification of brain and muscle signal alterations in patients with and without treatment-related fatigue and cognitive-assessment testing in patients experiencing chemotherapy-related cognitive dysfunction.

Patients and participants also undergo collection of data to obtain information on patient age, body mass index, and menopausal status at baseline and at 1 year. Additional information is collected on type of chemotherapy treatment and any hormonal or other anticancer treatments administered throughout the course of the study. Cancer recurrences or new cancer events are also recorded.