Figure 1.

Inadvertent detachment of a Solitaire FR stent during mechanical thrombectomy in a 74-year-old man who presented with sudden-onset dysarthria and left-sided hemiparesis. A) Initial angiogram showing acute occlusion of the right M1 segment of the middle cerebral artery. B) The entire length of the stent (arrow) was unfolded, immediately restoring anterograde flow through the stent, and displacing the clot. C) During device retrieval, the distal tip was evident (arrowhead) outside of the microcatheter (solid arrow) and some resistance was perceived by the interventionalist (the asterisk indicates the distal tip of the stent, and the dashed arrow indicates the entire length of the stent). D,E) The pushwire was withdrawn without resistance, but the proximal (arrowhead) and distal (asterisk) positions of the stent were unchanged. F) CT angiography image indicating flow through the patent stent (proximal portion, arrowhead; distal portion, asterisk) at 1 day after treatment. G) Transcranial Doppler sonography performed 7 months later indicated that the flow through the stent was normal, with a peak systolic velocity and resistance index of 98.3 cm/s and 0.61, respectively.