PMC7718136_01
(A) an axial CT showing the beak sign with an upper aorto-mesenteric angle measured at 14.2  (red arrow). (B) Curved image demonstrating Beak Sign at the aortomesenteric portion of the left renal vein.
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The abdominal examination found an epigastric and left hypochondrium tenderness, an abdominal CT scan was performed showing an aorto-mesenteric angle measured at 14.2  with a narrowing of the left renal vein at this (Fig. 1), and varicose dilatation of the homolateral gonadal vein (Fig. 2).