2.2. Intervention

The method of embolization was as previously described.^[10] In the case of embolization of the aneurysmal neck, the true lumen of the aneurysm underwent compact embolization, whereas the bleb formation underwent loose embolization (Fig. ​(Fig.1).1). However, in the case of embolization of the entire aneurysm, both the true lumen of the aneurysm and the bleb formation underwent compact embolization (Fig. ​(Fig.22).

A 57-year-old female complaining of sudden-onset headache showed SAH on head CT scan. (A) Cerebral DSA revealed an irregular-shaped aneurysm. (B) The true lumen of the aneurysm was completely occluded and the distal sac was loosely occluded. (C) The immediate angiography after embolization showed the complete occlusion of the aneurysm. (D) Follow-up angiography 14 months after embolization showed no residual or recurrent aneurysm. CT = computed tomography, DSA = digital subtraction angiography, SAH = subarachnoid hemorrhage.

A 52-year-old male with headache, nausea, and vomiting showed SAH on head CT scan. (A) Cerebral DSA revealed an aneurysm with bleb formation. (B) Both the true lumen of the aneurysm and distal sac were completely occluded. (C) The immediate angiography after embolization showed the complete occlusion of the aneurysm. (D) Follow-up angiography 13 months after the operation showed no residual or recurrent aneurysm. CT = computed tomography, DSA = digital subtraction angiography, SAH = subarachnoid hemorrhage.