Nutcracker syndrome involves compression of the left renal vein between which two structures?

Nutcracker syndrome involves compression of the left renal vein between which two structures?

• A. Superior mesenteric artery and aorta
• B. Left renal vein and IVC
• C. Aorta and renal artery
• D. SMA and left renal artery

Answer: (A)

Nutcracker syndrome is all about where the left renal vein gets squeezed. The left renal vein travels between two big vessels—the superior mesenteric artery in front and the aorta behind. When the angle between the SMA and the aorta narrows, the SMA can press the vein against the aorta, narrowing its lumen. That compression causes venous hypertension in the left kidney, leading to symptoms like hematuria and flank pain, and can even contribute to a left-sided varicocele. The other pairings don’t create that specific aortomesenteric compression, so they don’t explain this syndrome.

Nutcracker syndrome is all about where the left renal vein gets squeezed. The left renal vein travels between two big vessels—the superior mesenteric artery in front and the aorta behind. When the angle between the SMA and the aorta narrows, the SMA can press the vein against the aorta, narrowing its lumen. That compression causes venous hypertension in the left kidney, leading to symptoms like hematuria and flank pain, and can even contribute to a left-sided varicocele. The other pairings don’t create that specific aortomesenteric compression, so they don’t explain this syndrome.