A 32 year old otherwise healthy man came with uncontrolled seizures and mild right sided weakness with a large vascular malformation in the left temporo-occipital region.

He was embolised with Onyx.

The immediate post embolisaion CT was fairly encouraging.

However he suddenly developed seizures and right sided weakness 4 hours later. An urgent CT showed hematoma and IVH.

The hematoma was evacuated immediately. An MRI and DSA done in follow up show good result. The patient had only mild deficit not significantly changed since his pre-embolisation state.