Fig 5.

Pathology of untreated, stented, and flow-diverted saccular aneurysms. The saccular aneurysm has an organized thrombus in its dome (white asterisk in A), with a thin wall with interruption of the elastic lamina at the neck (A, magnified view in B, black arrow). In case of treatment failure, the neck was wide open with a persistent aneurysmal cavity (black asterisk), which was only partially filled with unorganized thrombus (C), whereas in case of treatment success, the stent struts were covered with a thick and continuous neointima and the aneurysm cavity was filled with organized thrombus containing areas of hemosiderin (D) (Movat staining, original magnification ×50).