a


b


c


d

Fig.1. MR-tomograms in axial (a) and coronary (b) planes (T2-WEIGHTED): a knot of AVM. MR-angiography in a TOF mode (c, d): branches of ACA and MCA, feeding malformation; drainage into the superior sagittal sinus; aneurysmal widening in bifurcation of the pericallous artery (an arrow).