“…In addition, patients can have a mild leukocytosis and fever for 1 to 2 days after a renal infarct, further complicating the diagnostic process. 68 In the setting of relevant risk factors (myocardial infarction, malignancy, aortic aneurysm, and cardiac valvular disease), CT imaging with contrast should be performed when there is an enlarged kidney with surrounding perinephric edema of unknown cause on an initial unenhanced CT. 4 The most common cause for renal infarction is thromboembolism from a cardiac source. Although nonspecific, markedly elevated serum lactate dehydrogenase levels, a serum marker for cell necrosis, is helpful in suggesting the diagnosis.…”