ABSTRACT Background Perirenal hematomas are commonly observed in patients with renal trauma; however, secondary infections are uncommon and often underdiagnosed. Case Presentation An 82‐year‐old woman with a history of diabetes mellitus and liver cirrhosis presented to our emergency department with intermittent fever, malaise, and lower back pain 1 month after sustaining a fall. Contrast‐enhanced computed tomography (CT) showed an 8‐cm gas‐containing left perirenal hematoma without urinary extravasation, and blood culture revealed Klebsiella pneumoniae . The patient was initially treated with intravenous antibiotics; however, CT‐guided percutaneous drainage was eventually required for clinical and radiologic resolution. Conclusion Delayed‐onset infection in traumatic perirenal hematoma needs to be considered in high‐risk patients for early definitive source control.
Nakamura et al. (Thu,) studied this question.