Oncology is a branch of medicine that deals with the study, diagnosis, treatment and monitoring of tumors. Tumors can be defined as abnormal growth of cells in the body which can be benign or malignant. Oncological diseases are increasingly common diseases today, their treatment is complex because the main goal of treatment is to improve the quality of life of cancer patients. The causes of tumors are complex and often involve the interaction of various genetic, environmental and lifestyle factors. The most common tumors in the world for 2020 are: breast, lung, colon and rectal, prostate, skin and stomach cancer. The diagnosis of malignant tumors is a complex process that requires the involvement of a wide range of medical professionals and personnel. Given the diversity of malignant tumors, establishing a precise diagnosis requires the implementation of various diagnostic procedures, as well as the involvement of various health professionals, i.e. the cooperation of a multidisciplinary team. The diagnosis is made on the basis of history, a thorough physical examination and various diagnostic procedures. Psycho-oncology studies the psychological and emotional aspects associated with the diagnosis, treatment and survival of oncological diseases. Her goal is to understand how patients and their families experience stress, face the diagnosis, and how emotional and mental factors affect the course of the disease. The stages that cancer patients go through are fear, uncertainty and acceptance. The treatment of the patient must not be focused only on the symptoms and side effects that occur, but on improving the quality of life of the affected persons, that is, training the patient so that he can function independently on a daily basis. Tumor treatment is also aimed at removing, monitoring or mitigating pathological changes caused by the uncontrolled spread of malignant cells. Depending on the type and stage of the tumor, treatment includes surgery, chemotherapy, radiotherapy and hormone therapy. The rehabilitation process does not begin until after surgery or in an advanced stage of the disease, but with the establishment of a final diagnosis. Each physiotherapy treatment begins with an assessment based on which short-term and long-term goals are set. For oncology patients, physiotherapy treatment can be crucial in reducing side effects of treatment, improving functionality and promoting recovery. It is based on a holistic and individual approach, taking into account the specific needs of the patient. Some of the therapeutic procedures used are: kinesitherapy, physical procedures, PNF, manual lymphatic drainage and education.