PT - JOURNAL ARTICLE AU - Sabareesh K Natarajan AU - Yuval Karmon AU - Rabih G Tawk AU - Erik F Hauck AU - L Nelson Hopkins AU - Adnan H Siddiqui AU - Elad I Levy TI - Endovascular treatment of patients with intracranial stenosis with moyamoya-type collaterals AID - 10.1136/jnis.2011.004754 DP - 2011 Dec 01 TA - Journal of NeuroInterventional Surgery PG - 369--374 VI - 3 IP - 4 4099 - http://jnis.bmj.com/content/3/4/369.short 4100 - http://jnis.bmj.com/content/3/4/369.full SO - J NeuroIntervent Surg2011 Dec 01; 3 AB - Purpose The authors report the endovascular treatment of intracranial stenosis in six patients with moyamoya-type collaterals.Patients All patients previously had experienced a stroke or transient ischemic attack. Lesion locations included a unilateral M1-segment lesion in five patients; and ipsilateral internal carotid artery (ICA)-T, M1 and A1 lesions with contralateral supraclinoid ICA stenosis in one patient. Mean M1 stenosis was 77.3±14.3%.Results Six patients had balloon angioplasty; in one, a Wingspan stent deployed successfully after angioplasty failed to relieve the stenosis. Mean post-treatment stenosis was 41.0±33.0%. In one patient, vessel rupture occurring during angioplasty caused severe disability. Two patients were asymptomatic for 4 years and 6 months, respectively. One asymptomatic patient had severe restenosis re-treated with intracranial stenting. Two patients became symptomatic and had re-treatment at 1 and 2 months, respectively.Conclusion Endovascular treatment of intracranial stenosis with moyamoya-type collaterals is possible but is associated with high rates of symptomatic restenosis and target-lesion revascularization.