Fig 1.

Coil retrieval. A, Displaced coil is visible in the more distal ACA, distinct from the coil mass within the anterior communicating artery aneurysm. The coiling microcatheter has been removed. The stent retriever delivery catheter is seen traversing the aneurysm neck, and the stent retriever has been deployed adjacent to the errant coil. B, Retraction of the stent shows capture of the displaced coil. Note the conformational change to the displaced coil mass. C, The stent retriever is pulled from the intracranial circulation with coil engaged, past the existing coil mass. D, The coil is successfully removed, without disruption of the remaining coil within the aneurysm. Additional coils were subsequently placed in the aneurysm to complete the procedure.