Fourty-five cases of intracranial atherosclerotic stenoses greater than 70% for intradural lesions or 60% for extradural lesions were treated by PTA or stenting. The stenotic lesions were successfully dilated in 44/45 patients and future stroke was prevented during a mean 29 month follow-up period. Stenotic ratio significantly reduced in stent-treated group compared with PTA-treated group and stenting was effective for cases refractory to PTA, such as elastic recoil or restenosis. However, stenting had its own drawbacks, such as difficulty in delivery, migration, and acute thrombosis.
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