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Prognosis

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Haemorrhage from AVM's carries a lower mortality than aneurysmal rupture; the latter has a 10% risk.

Small, unruptured AVM's have a 15% chance of bleeding over 5 years; the risk is greater for small AVMS - 50% - if less than 3 cm in size. Only ruptured AVM's have an increased risk of bleeding.

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