Tumors are an increasingly common diagnosis today, and the word "tumor" in translation means swelling, and is a term used to denote uncontrolled cell division, which occurs due to disorders of regulatory, fundamental mechanisms of the cell. Tumor diagnosis includes mammography, computed tomography, radiological diagnostics, magnetic resonance imaging and ultrasound diagnostics. The methods used are: surgical treatment, drugs (chemotherapy, targeted therapy, hormone therapy, immunotherapy) and radiotherapy. Nowadays, there is a growing need for physiotherapy and rehabilitation of cancer patients, in order for patients to achieve the highest possible quality of life. Physiotherapy is part of the rehabilitation process, and enables maintenance, restoration of functional abilities, and the return of patients to daily activities and return to professional life. In oncology treatment itself, rehabilitation is found in almost all phases of treatment, and the greatest need is after surgical treatment. Psychological and psychosocial support is of great importance for people with cancer. It enables them to cope with the disease easier, to adapt to the disease, has a beneficial effect on the effect of therapy, improves the quality of life and rehabilitation itself. Mention the importance of the expertise and education of the physiotherapist as a health professional. As a health professional, a physiotherapist possesses the knowledge and skills necessary for the prevention of patients with oncological diseases. Physiotherapist educates patients and advises them on the importance of maintaining health, developing and maintaining maximum functional ability and mobility.