Incidental Postmortem Diagnosis of Anterior Communicating Artery Aneurysm After Successful Treatment of Double Aneurysms of the Superior Cerebellar and Paraclinoid Internal Carotid Arteries

Intracranial aneurysm diagnosis uses several tools, of which digital subtraction angiography is still the gold standard. Computed tomography angiography is widely used for its specificity and sensibility. The 3D slicer software is an interesting diagnosis tool that provides high-quality 3D modeling. It facilitates diagnosis and improves aneurysm assessment. However, it is still not approved for clinical tasks. We present a case of a woman treated for a ruptured paraclinoid and superior cerebellar artery aneurysms, and who succumbed to a post-procedural rebleeding. During a research routine, we realized a computed tomography angiography-based 3D slicer modeling that detected an incidental anterior communicating artery aneurysm. This case illustrates an unusual association of two rare intracranial aneurysm locations and the usefulness of the 3D slicer modeling tool in the diagnosis of intracranial aneurysms. Through this report, we recommend using this tool worldwide for clinical tasks.