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Figure 3: Case 8, MRI and DSA. There are no abnormal signals on T1, T2 weighted images. DSA reveals string sign on V2-V3 segments of the left vertebral artery (b: lateral view). DSA reveals a mouse tail-shaped stenosis in the lower part of V2 segment in the left, anterior oblique 32 degrees (c: black arrow), double-lumen sign on V2-V3 segments, and the lifted intima in the lumen (c: white arrow). After two Firebird stents (3.5×33mm) were implanted, the stenosis was corrected (d, e: black arrow), and double-lumen sign disappeared (e: white arrow)

Figure 3: Case 8, MRI and DSA. There are no abnormal signals on T1, T2 weighted images. DSA reveals string sign on V2-V3 segments of the left vertebral artery (b: lateral view). DSA reveals a mouse tail-shaped stenosis in the lower part of V2 segment in the left, anterior oblique 32 degrees (c: black arrow), double-lumen sign on V2-V3 segments, and the lifted intima in the lumen (c: white arrow). After two Firebird stents (3.5×33mm) were implanted, the stenosis was corrected (d, e: black arrow), and double-lumen sign disappeared (e: white arrow)