A medical oncologist assesses the type and stage of malignant disease, plans the therapeutic approach, and monitors treatment response and potential side effects of therapy. They treat various malignant diseases, including cancers of the breast, lung, digestive tract, prostate, kidney, bladder, ureters, gynecological region, head and neck cancers, sarcomas, NETs, as well as tumors of other organs.

Contemporary oncological management includes: clinical examination, laboratory analyses, radiological diagnostics, pathohistological and molecular analyses, and multidisciplinary consultations. The goal of treatment is to prolong and improve the patient's quality of life, control the disease, and achieve the best possible therapeutic outcomes through an individualized approach.