Intravascular Ultrasound in the diagnosis and treatment of chronic cerebrospinal venous insufficiency

Figure 9: Intimal hyperplasia

Figure 9A: Intimal hyperplasia after thrombosis recanalization: 1. It is difficult to see the stenosis on this axial image because of the lack of echogenicity of the cause. 2. The longitudinal view shows this to great advantage. Arrows point to the edge of intimal which is markedly thickened.

Figure 9B: Intimal Hyperplasia within stent: 1. Venography shows occlusion of a stent placed during treatment of CCSVI by another physician. Differentiation of thrombus and intimal hyperplasia cannot be discerned. 2. After first attempt of suction aspiration, axial IVUS differentiates echogenic stent (black arrow) from echolucent intimal hyperplasia (white arrow) from echogenic thrombus (dotted arrow).