%0 Journal Article %A Walter S Lesley %T Bilateral mirror posterior inferior cerebellar artery aneurysms: diagnostic caveat on catheter angiography %D 2011 %R 10.1136/jnis.2010.004200 %J Journal of NeuroInterventional Surgery %P 383-385 %V 3 %N 4 %X Only three definitive cases of bilateral mirror proximal posterior inferior cerebellar artery (PICA) aneurysms have ever been reported. A fourth example is presented where each PICA aneurysm remained angiographically occult on contralateral vertebral artery angiography despite retrograde filling of the parent vessel PICA. Implications for clinical practice are discussed. %U https://jnis.bmj.com/content/neurintsurg/3/4/383.full.pdf