A method for treating a bifurcation aneurysm, the aneurysm having an aneurysm neck, by positioning a first mechanically expandable device in a first bifurcation branch proximate to the aneurysm neck positioning a second mechanically expandable device in a second bifurcation branch proximate to the aneurysm neck and expanding the mechanically expandable devices to constrict the aneurysm neck such that blood circulation to the bifurcation aneurysm is reduced.
