Cancer is a tumor that occurs as a result of irregular and uncontrolled division and proliferation of cells in an organ or tissue. In general terms, cancer creates an abnormal formation with the uncontrolled proliferation of cells in various parts of our body. These new and extra cells divide continuously and form masses called tumors. Cancer spreads throughout the body through a process called metastasis. Cancer cells leave their original location and pass through the blood or lymph system to form new tumors in other parts of the body. Cancer metastases are most commonly found in the bones, liver, or lungs. In the treatment of cancer, immunotherapy, radiotherapy, chemotherapy and surgical treatment are the most commonly used treatment methods. Although these treatments have side effects that may affect the patient, also, they are of great importance in the protective and restorative phase. Cancer rehabilitation also has an important place in order to increase independence and functional capacity and improve the quality of life in individuals with cancer. Cancer Rehabilitation reduces both the cost of health care and the risk of developing cancer. Although many Cancer Rehabilitation programs provide services for specific patient needs such as lymphedema, upper extremity functional disorder, gait and balance dysfunction, they are generally aimed to increasing functional capacity, strengthening large muscle groups, reducing pain, increasing flexibility and increasing the level of independence.