title: Endovascular treatment of patients with intracranial stenosis with moyamoya-type collaterals.
abstract: OBJECTIVE
  The authors report the endovascular treatment of intracranial stenosis in six patients with moyamoya-type collaterals.
  
  
  METHODS
  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.
  
  
  CONCLUSIONS
  Endovascular treatment of intracranial stenosis with moyamoya-type collaterals is possible but is associated with high rates of symptomatic restenosis and target-lesion revascularization.
authors: Department of Neurosurgery, University at Buffalo, State University of New York, Buffalo, New York 14209, USA.
authors: Sabareesh K
authors: SK
authors: Natarajan
authors: Yuval
authors: Y
authors: Karmon
authors: Rabih G
authors: RG
authors: Tawk
authors: Erik F
authors: EF
authors: Hauck
authors: L Nelson
authors: LN
authors: Hopkins
authors: Adnan H
authors: AH
authors: Siddiqui
authors: Elad I
authors: EI
authors: Levy
mesh_terms: D000328:Adult; D000800:Angioplasty, Balloon / Q000379:methods; D057510:Endovascular Procedures / Q000379:methods*; D006801:Humans; D008875:Middle Aged; D009072:Moyamoya Disease / Q000000981:diagnostic imaging* / Q000601:surgery*; D011859:Radiography; D015607:Stents; D016896:Treatment Outcome