RT Journal Article SR Electronic T1 Neonatal giant pial arteriovenous malformation: genesis or rapid enlargement in the third trimester JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP 151 OP 153 DO 10.1136/jnis.2009.000299 VO 1 IS 2 A1 C A Potter A1 J Armstrong-Wells A1 H J Fullerton A1 W L Young A1 R T Higashida A1 C F Dowd A1 V V Halbach A1 S W Hetts YR 2009 UL http://jnis.bmj.com/content/1/2/151.abstract AB A neonate with congestive heart failure at birth due to a nearly holohemispheric pial arteriovenous malformation is described. This occurred despite a normal second trimester prenatal sonogram. Successful treatment of heart failure was achieved by embolization alone. This case demonstrates that hemodynamically significant lesions may arise later or enlarge more rapidly in utero than previously thought.