Left renal vein compression. What's going on?

Left renal vein compression is more common in nutcracker syndrome, mainly due to abnormal anatomical factors. The left renal vein normally runs between the superior mesenteric vein and abdominal aorta. There is a left renal vein passing through the angle between the two arteries. If the angle is small, it will often lead to left renal vein compression. After the left renal vein is compressed, the reflux resistance will increase. Therefore, it will lead to renal pelvis blood. Clinically, hematuria of unknown cause often occurs. For this condition, active treatment is needed, so to relieve the symptoms of hematuria, the common treatment method is to improve the compression of the left renal vein through surgery.