Nutcracker phenomenon

The nutcracker phenomenon (NCP), also known as left renal vein entrapment refers to a situation of impeded outflow from the left renal vein (LRV) into the inferior vena cava (IVC) as a result of compression and is often accompanied by demonstrable lateral (hilar) dilatation and mesoaortic narrowing. It can be a common incidental finding on routine CT imaging and many patient's can be asymptomatic 2

If associated with relevant symptoms it is then known as the nutcracker syndrome


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Article information

rID: 70879
Synonyms or Alternate Spellings:
  • Nutcracker phenomenon (NCP)
  • Left renal vein entrapment

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Cases and figures

  • Case 1
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  • Case 2
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