Oncology is a branch of medicine concerned with the prevention, diagnosis, and treatment of cancer. Cancer is a disease, which involves abnormal growth of a cell. These cells have the potential to invade or spread to other parts of the body. There are different forms of cancer such as esophageal cancer, blood cancer, cervical cancer, lung cancer, stomach cancer, etc. Consumption of tobacco or alcohol, obesity and advanced age are some of the common factors that increase the risk of cancer. Common diagnostic tests used in this domain include computed tomography, biopsy, ultrasonography, magnetic resonance imaging, etc. Treatment methods include radiation, chemotherapy surgery, surgery, targeted therapy and hormonal therapy. This book studies, analyses and upholds the pillars of oncology and its utmost significance in modern times. A number of latest researches have been included to keep the readers up-to-date with the global concepts in this area of study. It is a resource guide for experts as well as students.