Ruptured intracranial aneurysm presenting as cerebral circulation insufficiency: A case report

Figure 1 First head computed tomography images. A: No abnormal density lesion was found near the parasellar region; B: No abnormal density lesion or subarachnoid hemorrhage was observed in the suprasellar cistern and annular cistern; C and D: No obvious subarachnoid hemorrhage was observed in any sulci or cistern.

Figure 2 Head computed tomography at admission. A and B: A lesion with an abnormal density (orange arrow) was observed on the right side of the parasellar region; C and D: No obvious subarachnoid hemorrhage was observed in any sulci or cistern.

Figure 3 Preoperative computed tomography angiogram. A 5 mm × 11 mm aneurysm in the right internal carotid artery (orange arrow) was detected.

Figure 4 Postoperative imaging data. A-C: Noncontrast computed tomography (CT) images showing normal postoperative appearance; D: CT angiogram showing that the previous aneurysm is no longer visible.