Two Patients with Large Aneurysms in Whom Coil Embolization with Overlapping LVIS Stents Was Performed

Area of Science:

• Neurosurgery
• Interventional Neuroradiology
• Vascular Neurology

Background:

• Large unruptured intracranial aneurysms pose significant treatment challenges.
• Traditional stent-assisted coil embolization (SACE) may have limitations for complex aneurysm morphologies.
• Low-profile visualized intraluminal support (LVIS) stents offer advanced device options for endovascular repair.

Observation:

• Two patients with large unruptured aneurysms were treated with overlapping LVIS stent-assisted coil embolization (LSACE).
• Case 1 involved an internal carotid artery aneurysm presenting with abducens nerve palsy.
• Case 2 involved a partially thrombosed fusiform vertebral artery aneurysm.

Findings:

• Immediate digital subtraction angiography (DSA) showed residual dome filling in both cases.
• Follow-up DSA several months post-procedure demonstrated complete aneurysm occlusion.
• Overlapping LSACE achieved successful aneurysm obliteration with favorable long-term results.

Implications:

• Overlapping LSACE represents a potentially effective strategy for complex unruptured aneurysms.
• This technique may provide superior flow-diverting effects compared to standard SACE.
• LSACE expands endovascular treatment options for challenging intracranial aneurysms.