Prospective Screening for Breast Cancer-related Lymphedema

Inclusion Criteria: * Confirmed diagnosis of breast cancer * Ability to obtain physical positioning for perometry (e.g. abducting shoulder to 90 degrees) and BIS measurements (e.g. standing without aid) Exclusion Criteria: * Evidence of distant metastatic disease that may cause edema, * Previous breast cancer * History of lymphedema * Pregnancy at the time of accrual and/or cardiac implants (contraindications for BIS)Pregnancy * Medical conditions that cause fluid retention or swelling (e.g. axillary cancer recurrence, renal insufficiencyRenal, congestive heart failureCardiac).