Ruptured basilar tip aneurysm

Case contributed by Henry Knipe
Diagnosis certain


Sudden collapse. Obtunded on arrival to ED.

Patient Data

Age: 70 years
Gender: Female

Extensive subarachnoid hemorrhage centered on the basal CSF cisterns. Intraventricular extension with hydrocephalus. Generalized sulcal effacement suggestive of cerebral edema. 

CTA demonstrates a 5 mm aneurysm arising from the basilar tip. No further aneurysm identified.

Case Discussion

Pattern of subarachnoid blood on the non-contrast CT is suggestive of a posterior circulation aneurysm, as was subsequently demonstrated. This patient went onto endovascular coiling.

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