This is a neoplasm arising in the epithelium of the uterine cervix. Neoplasia is uncontrolled new growth. Neoplastic cells are no longer under complete physiologic control. Note the mass of abnormal tissue on the surface of this cervix. The term "tumor" is often used synonymously with neoplasm, but a "tumor" can mean any mass effect, whether it is inflammatory, hemodynamic, or neoplastic in origin. Once a neoplasm has started, it is not reversible.