Types, mechanism and management of various endoleaks
| Endoleak subtype | Mechanism | Management |
|---|---|---|
| Type I | Attachment site endoleak Ia—Proximal attachment site Ib—Distal attachment site | Stent graft resizing/open repair |
| Type II | Retrograde flow through a collateral feeder vessel (commonly inferior mesenteric or lumbar artery) | Follow-up imaging and intervention only if increasing size/symptomatic |
| Type III | Fabric tears, graft wall defect or modular disconnection | Immediate repair |
| Type IV | Due to graft wall porosity | Benign, intervene only if aneurysm expansion |
| Type V | Endotension | Benign, intervene only if aneurysm expansion |