LAUSR

Nutcracker phenomenon (NCP) occurs when the left renal vein (LRV) is excessively compressed between the abdominal aorta (AA) and the superior mesenteric artery (SMA) [1]. It is called nutcracker syndrome (NCS) when NCP is accompanied by otherwise-unexplainable symptoms or signs, such as hematuria, proteinuria, or left flank pain. NCS is rare, but its exact prevalence remains unknown [2]. NCS is registered as a rare condition on medical websites, such as the Genetic and Rare Diseases Information Center at the National Institutes of Health (NIH-GARD) and Orphanet [2]. This letter alerts readers that this syndrome may be much more common than previously thought. Kim [3] reported, “we may assume that NCS may not be a rare entity, and the prevalence may be higher than previously thought.” patients ultrasound