Nutcracker Syndrome

In medicine, the nutcracker syndrome — also known as nutcracker phenomenon, renal vein entrapment syndrome, or mesoaortic compression of the left renal vein — is a compression of the left renal vein between the abdominal aorta (AA) and superior mesenteric artery (SMA). The popular name "nutcracker syndrome" derives from the fact that, in the sagittal view, the SMA and AA (with some imagination) appear to be a nutcracker crushing a nut (the renal vein).
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