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Failure to deploy the WEB due to the tortuous vessel anatomy. A, Unruptured AcomA aneurysm. B, WEB-DL (arrow on the second of 3 marker bands) could not be advanced through a tortuous turn by using only the delivery catheter. C, WEB-DL could not be advanced through the tortuous turn with intermediate catheter support of the delivery catheter (arrow shows the proximal marker of the WEB). D, Final result after balloon-assisted coiling of the aneurysm.
