Ultrasound of Nutcracker syndrome

Ultrasound in an 11-year-old boy with Nutcracker syndrome and left varicocele who presented with intermittent macroscopic hematuria.
(Panel A) Transverse plane view of the left renal vein (delta) demonstrates significant narrowing between the superior mesenteric artery (asterisk) and the aorta (arrow).
(Panel B) Doppler study in sagittal plane view reveals increased velocity in the left renal vein towards its narrowed zone.