it is imperatives to get a good quality 4 bessel DSA STUDY is presiquite. preoperative delineation of nidus.venous drainage pattern superficial or deep or mixed need to be examined. Further topographic location of feeding arteries and relation to adjacent eloquent brain areas and relation with previous cavity of old bleed and gliosis and detailed anatomical study is must and every neurosurgeons are kindly requested to get acquinted with anatomy and detailed radiological findibgs including presence of venous sac and flow related aneurysm needs to considered in detail