CASE-REPORT - MRI AND MR-ANGIOGRAPHY OF BASILAR ARTERY DISSECTION IN A CHILD

MRI showed a pontine infarct and mural thickening of intermediate sign al in T1 weighted images proximal to occlusion of the basilar artery i n a 10-year-old boy. Two days later the mural thickening was of high s ignal, consistent with methaemoglobin formation and MR angiography (MR A) showed nonspecific lack of flow in the mid-segment of the basilar a rtery, which corresponded to a tapered occlusion at arteriography. MRI is more useful than MRA for noninvasive diagnosis of basilar artery d issection.