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Figure 1: b/l MMD with basilar tip aneurysm: SWI (a) shows bleed in right occipital horn. CEMRA (b) revealed uniform narrowing of bilateral ICA. 3D TOF source image (c) shows multiple tiny collaterals in suprasellar cistern and basilar top bulbosity. SSD image (d) of DSA shows the basilar tip bulbosity. DSA shows severe narrowing of bilateral supraclinoid ICA with abnormal moyamoya collateralization in lenticulostriate region (e,f). Bilateral ECAs are hypertrophied. Vertebral artery injection (g,h) shows filling of bilateral MCA and a fusisaccular aneurysm at basilar top

Figure 1: b/l MMD with basilar tip aneurysm: SWI (a) shows bleed in right occipital horn. CEMRA (b) revealed uniform narrowing of bilateral ICA. 3D TOF source image (c) shows multiple tiny collaterals in suprasellar cistern and basilar top bulbosity. SSD image (d) of DSA shows the basilar tip bulbosity. DSA shows severe narrowing of bilateral supraclinoid ICA with abnormal moyamoya collateralization in lenticulostriate region (e,f). Bilateral ECAs are hypertrophied. Vertebral artery injection (g,h) shows filling of bilateral MCA and a fusisaccular aneurysm at basilar top