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Crescent sign in abdominal aortic aneurysm
  1. Pooya Iranpour,
  2. Sara Haseli
  1. Radiology Department, Shiraz University of Medical Sciences, Shiraz, Iran
  1. Correspondence to Dr Pooya Iranpour, pooya.iranpour{at}

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A 70-year-old man referred to emergency department with acute onset of severe flank pain. In initial examinations, the patient was pale, with pulse rate of 120/min and blood pressure of 95/65. In abdominal palpation a pulsatile mass was detectable. Urgent resuscitation was done.

The patient had been known to have hypertension and abdominal aortic aneurysm (AAA) since 7 years ago. Abdominal CT scan without and with contrast injection (figures 1 and 2) showed a large fusiform abdominal aorta with crescentic focus of hyperdensity (black arrow) …

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