Figure 4.

Residual aneurysm three months after treatment with single flow diverter (FD) (a), which was re-treated (b) with a second FD (white arrows) and PHIL liquid embolic delivered through a microcatheter (black arrow). At three months, persistent aneurysm filling was observed (arrow in c). Magnified photography showed white liquid embolic on either side of the FD mesh (arrow in d), with persistent leak into the aneurysms at (black arrow in e). Histopathology showed minimal reaction to the liquid embolic (black arrow in f) inside the aneurysm fundus (haematoxylin, phloxine and saffron stain, original magnification × 50).