**1. Introduction**

Neoplasia ! new growth

Oncology ! study of tumors or neoplasm.

('Oncos' means Tumor)

Definition ! Neoplasia is defined as a genetic disorientation of cell growth that is triggered by acquired or less commonly inherited mutations affecting a single cell or its clonal progeny [1].

These mutations give the neoplastic cells a survival and growth advantage, resulting in excessive proliferation that is independent of physiological growth signals and control.
