XXXX : MR findings.

@entity1 @entity6623 @entity548 @entity2695
Seven @entity1 with suspected @entity6623 studied by either CT or angiography were imaged with magnetic resonance. Six of seven cases demonstrated a stellate appearance on contrast enhanced CT. In two @entity1 this finding was verified by angiography. Flow void was identified on both T1- and T2-weighted pulse sequences. In one @entity1 a field echo sequence demonstrated high intensity signal within the @entity6623 . Magnetic resonance proved superior to CT in the identification of these lesions. A stellate configuration with an emanating transcortical vein and centrifugal drainage (transcortical venous flow) from the @entity2695 into a sinus was present in all cases. Centripetal drainage via thalamostriate and internal cerebral veins was not seen. There was no evidence of mass effect, scar, or @entity548 . Four of the @entity2695 were located in a frontal lobe and three in a cerebellar hemisphere. This distribution of the lesions is similar to that reported in the literature in which the frontal lobe is the most common location followed by the cerebellar hemisphere. An embryological explanation is cited and supported by a review of the literature.
