Fig. 2

Patterns of vortex vein dilation: (a) Upper-dominant vortex vein dilation, (b) symmetric vortex vein dilation, (c) lower-dominant vortex vein dilation, (d) non-anastomosed vortex vein.
Patterns of vortex vein dilation: (a) Upper-dominant vortex vein dilation, (b) symmetric vortex vein dilation, (c) lower-dominant vortex vein dilation, (d) non-anastomosed vortex vein.