“…The etiology was correctly identified with an overall sensitivity and specificity of 0.11 and 0.33, respectively, for ultrasound and 0.57 and 0.82, respectively, for CT scan. However, although MRI is also useful in diagnosing SRH and could differentiate an intrarenal hematoma from a perirenal hematoma with greater accuracy, it also has major drawbacks, which are that it requires longer imaging time and increased cost (11). CT scans are the most valuable technique for suspected SRH or perirenal hemorrhage, and are essential in making the diagnosis and ruling out other complications of APN, such as focal or multifocal nephritis, a renal or perirenal abscess, emphysematous pyelonephritis, or a urinoma (2,3).…”