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Introduction
Figure 11. Classification of Endoleak Types
Endoleaks are classified by 5 types:
• Type Ia, proximal attachment site endoleak
• Type Ib, distal attachment site endoleak
• Type II, backfilling of the aneurysm sac through branch vessels of the aorta
• Type III, graft defect or component misalignment
• Type IV, leakage through the graft wall attributable to endograft porosity
• Type V, caused by "endotension," possibly resulting from aortic pressure
transmitted through the graft/thrombus to the aneurysm sac.
Adapted from Rokosh, et al. J Vasc Surg. 2021;74:1438-1439. Copyright 2021, with permission
from Elsevier, Inc., and the Society for Vascular Surgery.
