PMC10159284_01
(a) Head computed tomography (CT) scan revealing subarachnoid hemorrhage in the basal cistern and in the left ambient cistern, (b) pre-operative three-dimensional CT angiography depicting the left internal carotid-posterior communicating (IC-PC) aneurysm, (c) pre-operative cerebral angiogram confirming the left IC-PC aneurysm, and (d) post-operative cerebral angiogram showing the complete obliteration of the aneurysm (Raymond-Roy occlusion classification class I) by simple coil embolization.
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F1
The patient recovered well without any neurologic deficits. The head CT scan right after the embolization showed no abnormal findings, as shown in Figure 1.
(a) Diffusion-weighted imaging (DWI) on postoperative day (POD) 7 showing no high signals, (b and c) fluid-attenuated inversion recovery (FLAIR) on POD7 showing no abnormal findings, (d) DWI on POD24 showing no high intense lesions, whereas (e and f) FLAIR on POD24 demonstrating a strange round high intense lesion beside the posterior horn of the left lateral ventricle. (g) DWI on POD44 showing no high signals, whereas, (h and i) FLAIR on POD44 depicting scattered small high intense lesions in the left frontal lobe, (j) DWI on POD146 showing no abnormal findings, and (k and l) FLAIR on POD146 confirming the complete disappearance of the high intense lesions.
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F2
Despite no neurologic deficits after the surgery and no abnormal findings on a MRI 7 days after the coil embolization, an MRI study performed 24 days after the embolization demonstrated a round lesion beside the posterior horn of the left lateral ventricle, as shown in Figure 2.