Acute Pyelonephritis With Cullen's Sign Masquerading As Pancreatitis.

Cullen's sign is well described in the literature as subcutaneous ecchymosis in the periumbilical region. It is most commonly represented with acute pancreatitis. Recently, there have been many case reports associated with this sign to different clinical scenarios. A 61-year-old gentleman reported to the ED with left flank pain, intermittent fever, and a periumbilical ecchymosis on abdominal examination. Numerous tests were performed to rule out the likelihood of acute pancreatitis. The patient was diagnosed with acute pyelonephritis and received appropriate treatment. Cullen's sign should raise suspicions of retroperitoneal or intraabdominal abnormalities. While the pathophysiological process underlying the emergence of this symptom frequently signals retroperitoneal bleed, this is not always the case.