Renal injuries are present in 8-10% of patients presenting with blunt abdominal trauma and up to approximately 6% of patients presenting after penetrating injury. Overall, blunt trauma accounts for up to 80% of all renal injuries . Trauma is a leading cause of morbidity and mortality all over the world. Blunt abdominal trauma accounts for more abdominal injuries than the less frequent penetrating injuries. The AAST classification consists of five injury grades, ranging from mild (Grade I) to severe (Grade V). From an imaging standpoint, the AAST classification is based on three main parameters: degree of parenchymal injury, vascular injury and collecting system disruption. The utility of this classification scheme lies in its ability to predict clinical outcome with reasonable accuracy