Fig. 1.

A 70-year-old male patient presented with dysarthria and hemiparesis due to left M1 occlusion.

A, B. Wingsspan delivery system was introduced into the occluded left middle cerebral artery (MCA). However, outer body could not been pulled back to deploy the stent because there was excessive resistance between inner and outer body of the delivery system.

C. Diagram shows the mechanism when and how the deployment failure happened. Note an acute angled bending of the inferior division of M2 (arrow).

D. Removed system showed that partially deployed the stent tip (arrow) in between outer body and stretched dual tapered (olive) tip (arrowhead).

E. Final angiogram shows rather good filling of the MCA branches after deployment of an Enterprize stent.