Nutcracker syndrome

The nutcracker syndrome (NCS) results most commonly from the compression of the left renal vein (LRV) between the abdominal aorta (AA) and superior mesenteric artery (SMA), although other variants exist. The name derives from the fact that, in the sagittal plane and/or transverse plane, the SMA and AA (with some imagination) appear to be a nutcracker crushing a nut (the renal vein). [Source: Wikipedia ]

Synonyms
Aortomesenteric left renal vein compression
Left renal vein entrapment syndrome
Renal nutcracker syndrome
Renal vein compression syndrome
OrphaNet reference
Renal nutcracker syndrome 
May Cause
Venous dilatation
Venous occlusion
Aortomesenteric left renal vein compression
Left renal vein entrapment syndrome
Renal nutcracker syndrome
Renal vein compression syndrome