Fig. 5From: Clinical comparative analysis of 3D printing-assisted extracorporeal pre-fenestration and Castor integrated branch stent techniques in treating type B aortic dissections with inadequate proximal landing zonesPicture A, B: Formation of the “Bird-beak sign” at the leading edge of the castor main stent Picture C, D: Intraluminal narrowing within the Castor branch stentsBack to article page