Transarterial embolization of ruptured distal choroidal artery aneurysm in Moyamoya disease: A case series and literature review.

BACKGROUND

Moyamoya disease (MMD) is characterized by the compensatory development of collateral vasculature. Aneurysm formation on collaterals is common. The rupture of these aneurysms is associated with a poor prognosis, which presents significant treatment challenges.

CASE DESCRIPTION: We encountered two cases of distal choroidal artery aneurysm rupture in MMD. The first case experienced re-rupture and underwent superselective embolization. However, this case was complicated by an intraoperative rupture and subsequent hydrocephalus. The second case underwent parent artery occlusion without complications.

CONCLUSION

These cases highlight both efficacy and the risks involved. Lesion accessibility is crucial. A careful evaluation of collaterals and precise planning are required.