Oncology – field of medicine that studies the causes of tumors in the human body and traces of their destiny. Oncologists are developing new methods for diagnosis of the disease in the early stages of cancer, treatment of all types of tumors, as well as the prevention of disease. Oncologist – a doctor who deals diagnosis and treatment of neoplastic diseases. Modern medicine has strongly advises you to contact the oncologist at the slightest suspicion on the appearance of a tumor or its symptoms. Early diagnosis and early treatment can strongly influence the course and outcome.