Type 1

• endoleak related to the device itself

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Type 2

• endoleak due to retrograde flow from collaterals

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Type 3

• endoleak due to fabric tears, graft disconnection or disintegration

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Type 4

• flow through the graft presumed to be associated with graft wall "porosity"

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Endotension

• persistent or recurrent pressurization of the sac with no evidence of endoleak