PMC9842777_01
CT showed a patchy high-density shadow in the right frontal lobe
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There was a patchy high-density shadow with a size of approximately 26 mm * 17 mm * 25 mm (CT value of 77 HU) in the right frontal lobe (Figure 1).
Digital subtraction angiography demonstrated saccular aneurysms of the A1 segment of the left anterior cerebral artery and the M1 segment of the left middle cerebral artery
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SAH was established. It is suspected that a rupture of an unidentified preexisting aneurysm could be responsible for those findings. Subsequently, the patient received digital subtraction angiography, which demonstrated saccular aneurysms of the A1 segment of the left anterior cerebral artery and the M1 segment of the left middle cerebral artery (Figure 2).
Endovascular coil embolization of the aneurysms
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Endovascular coil embolization of the aneurysms (Figure 3) combined with external ventricular drainage was then performed, and the patient was transferred to our neurologic intensive care unit after those interventions.