Between 18-65 years old total 60 women will be recruited into the study in 3 separate groups.The first group will contain patients who had breast cancer surgery yet having no lymphedema. The inclusion criteria for involving the first group is surgery time. No one will be involved into the first group if surgery was applied 18 months ago before enrollment to this study. The second group will contain patients who had breast cancer surgery and having upper extremity lymphedema. The third group will contain healthy women. The aim of this study whether BIA and TDC methods are in capable of detecting lymphedema in an early stage. Measurements will be done at baseline, 6th month and 12th month. Exclusion criteria include being involuntary to recruit the study, bilaterally breast surgery history, having bilaterally upper extremity lymphedema, active infection, active chemotherapy and radiotherapy process, being in malignity period, and having mentally and cognitive disorders.