Clinical Oncology is a guide for oncology residents. An oncologist’s work starts from the point of diagnosis to achieving a cure or palliation by using the available resources most meaningfully. Oncology examinations aim at finding how much a trainee is fluent in such work before gifting him/her to the society. This needs the idea of pathology, basics of hematology, radiology, and genetics. All these important topics are addressed in the form of 12 short chapters. Case discussions are made interesting by sharing important and relevant points in eight long cases in question and answer format, including history, differential diagnosis, initial investigations, and their logical utilization in approaching a diagnosis.