Acute bilateral cerebellar infarcts in the territory of posterior inferiorcerebellar artery

The authors report 12 patients with acute bilateral cerebellar infarcts in posterior inferior cerebellar artery (PICA) territory. They found three top ographic patterns: A) bilateral medial PICA in six patients; B) unilateral whole + contralateral medial PICA in four; and C) bilateral small multiple in two. Nine patients in Groups A and B had unilateral PICA or vertebral ar tery disease, and both patients in Group C had bilateral vertebral artery d isease. These findings support that unilateral supply to both medial PICA t erritories may be the most relevant pathogenesis of this syndrome.