Effect of BOSU Exercises Added to Complete Decongestive Treatment on Balance in Breast Cancer-associated Lymphedema.

Inclusion Criteria: * Female gender * Patients aged 18-65 years * Having a history of unilateral mastectomy and lymph node dissection at least one year ago due to breast cancer diagnosis. * Having unilateral breast cancer-related upper extremity lymphedema (\>20% volume difference between the two upper extremities) according to the diagnostic criteria of the - International Society of Lymphology (Committee 2020) for at least six months. * Not having received lymphedema treatment or exercise therapy for the last six months * Completing breast cancer primary treatment at least 6 months ago (except hormone therapy/aromatase inhibitors) Exclusion Criteria: * Bilateral breast cancer * Bilateral axillary lymph node dissection * Metastatic breast cancer * Receiving ongoing radiotherapy or chemotherapy * Primary or bilateral lymphedema * Having active cancer * Presence of stage 3 lymphedema * Uncontrolled serious systemic disease (cardiopulmonary diseases, arterial or venous diseases, renal dysfunction, uncontrolled hypertension or hypotension). * Active or previous infection in the last 3 months (cellulitis, lymphangitis) * Presence of open wounds * Having any problems that may affect balance (vestibular, visual, neurological or orthopedic diseases) * Using medications that may affect body fluid and electrolyte balance (diuretics, etc.). * Individuals with serious mental and sensory problems * History of spine surgery in the last 6 months * Being pregnant * Body mass index \>40 k…