Screening For BCRL In Targeted Therapy For Breast Cancer

Inclusion Criteria: * Subjects who are receiving treatment in the MGH Breast Cancer Center who are enrolled in a DF/HCC-regulated targeted therapy trial for the treatment of early or metastatic breast cancer or patients being treated with a targeted therapy that may alter their risk of developing edema or BCRL will be eligible. * Subjects that will be eligible for the study include: * Females between 18 and 80 years of age * With a history of breast cancer * 4 weeks or more post-surgery * With or without edema * Undergoing treatment with targeted therapy for early or metastatic disease. Exclusion Criteria: \- Patients who cannot attain 90 degrees of shoulder abduction (position of measurement with Perometer).