| Type | Features |
| I | secondary to inadequate seal at the EVAR anchor site; occurs in up to 10% of case, almost never resolves and usually requires treatment to reseal the defect |
| II | the sac fills retrogradely via branch vessels arising from the lumbar, inferior mesenteric or internal iliac arteries and occurs in up to 25% of cases |
| III | mechanical failure due to defect on the graft or separation of the modular components |
| IV | secondary to graft porosity and almost always resolves within a few days post repair |
| V | endotension – expansion of aneurysm sac without demonstrable abnormality on CT angiography |