PMC4235117_01
Computed tomography angiography (CTA). Sagittal reconstruction showing a 3 mm aneurysm (arrow) arising from the left posterior communicating artery (PCoA), where the PCoA penetrates Liliquest's membrane
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F1
Computed tomography angiography (CTA) that was performed during the diagnosis of the stroke also revealed an aneurysm of the PCoA [Figure 1].
Magnetic resonance imaging (MRI). Axial T2-weighted image (a) showing a mass in the interpeduncular fossa measuring 14 mm in diameter, which is compatible with a thrombosed aneurysm. A gadolinium-enhanced sagittal T1-weighted sequence (b) reveals slight enhancement at the wall of the aneurysm
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F2
A day after the stroke, magnetic resonance imaging (MRI) showed a mass in the interpeduncular fossa that was larger than expected [Figure 2].
Anteroposterior (a) and lateral (b) views with digital subtraction angiography (DSA). The aneurysm is occulted by the supraclinoid portion of the internal carotid artery in the anteroposterior projection. In the lateral view, the aneurysm arises from the posterior communicating artery itself (arrow) and is attached to neither the internal carotid artery nor the posterior cerebral artery. The aneurysm measures 3.5 mm in dome height and 1.5 mm in neck width and originates 3 mm distal to the junction
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F3
Bilateral carotid and left vertebral angiography [Figures 3 and 4] revealed an aneurysm arising from the left PCoA itself.
Three-dimensional reconstruction image based on DSA depicts a true PCoA aneurysm (An, aneurysm; ICA, internal carotid artery; PCoA, posterior communicating artery; MCA, middle cerebral artery; ACA, anterior cerebral artery)
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Bilateral carotid and left vertebral angiography [Figures 3 and 4] revealed an aneurysm arising from the left PCoA itself.
Digital subtraction angiography (DSA) sequence showing coil embolization without complications
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F5
Postcoiling angiogram showed complete occlusion of the aneurysm [Figure 5].