Signal voids are usually noticed in these vessels on both equally T1- and T2-weighted spin echo sequence, whereas a hypersignal is noticed on gradient echo and contrast-Increased angiographic sequences indicating a higher-stream lesion. This type of AVM can be difficult to treat. It can be characterized by a mesh-like network https://www.sgvascularctr.com/understanding-venous-malformation-treatments-in-singapore/