Oncology

The term oncology literally means a branch of science that deals with tumors and cancers. The word “onco” means bulk, mass, or tumor while “-logy” means study.
What is cancer?
Each of the cells of the body have a tightly regulated system that controls their growth, maturity, reproduction and eventual death. Cancer begins when cells in a part of the body start to grow out of control. There are many kinds of cancer, but they all start because of out-of-control growth of abnormal cells.