The Mehran score has been the most widely used risk score for predicting the risk of CIN. In recent years, there was a proliferation of new scores and methods to predict CIN (Gao, et al.2014), however, their usefulness and extension to clinical practice is limited. The Mehran CIN score was designed in 2004 and based on its simplicity and because it allows early and correct identification of those individuals at high risk for CIN, it is currently the most widely used tool for predicting the risk of CIN.