Nutcracker Syndrome: Anatomical, Physiological and Clinical Correlations

Abstract

Nutcracker Syndrome (NCS) is a chronic vascular condition that occurs when the left renal vein (LRV) becomes compressed between nearby anatomical structures. This compression disrupts blood flow to the kidneys, leading to increased pressure within the kidney. Patients may experience a variety of symptoms, including hematuria (blood in urine), flank or abdominal pain, orthostatic proteinuria (protein in urine while standing), varicocele in men, or pelvic congestion syndrome in women. Prolonged elevated venous pressure can cause ongoing pain in the flank, pelvis, or lower back, especially during activities that increase intra-abdominal pressure. Over time, this chronic hypertension places significant stress on both the heart and kidneys, potentially leading to cardiovascular complications and worsening kidney function. Nutcracker syndrome is diagnosed through Doppler ultrasound, CT, MRI, and venography to assess renal vein compression. Treatment options include conservative management for mild cases, endovascular stenting, or surgical procedures like renal vein transposition and autotransplantation for severe cases. Timely diagnosis ensures effective management, relieving symptoms and preventing complications.