Computed tomography of renal emergencies: A comprehensive diagnostic guide for radiology residents

Figure 1 Grade I and II renal Injury. A: Axial view of the non-contrast enhanced computed tomography of the right kidney demonstrates a lentiform-shaped hyperattenuating subcapsular collection (white arrow) with mass effect on the adjacent renal parenchyma (black arrow), compatible with renal subcapsular hematoma and grade I renal injury; B: Coronal view contrast-enhanced computed tomography of the right kidney demonstrates a linear hypoattenuation (white arrow) measuring > 1 cm in length, consistent with renal laceration; C: The axial view shows a slightly iso- to hyperdense perirenal collection (white arrow), consistent with a perirenal hematoma. The constellation of findings is compatible with grade II renal injury.