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Dissecting and fusiform aneurysms of vertebro-basilar systems. MR imaging
Abstract:
The magnetic resonance (MR) findings of three cases with vertebro-basilar dissecting aneurysms (DA) were compared with those of two cases with vertebro-basilar fusiform aneurysms (FA). No abnormal findings, excepting a dilatation of a signal-void area corresponding to the arterial blood flow, were shown on the MR images in the patients with a FA. In contrast to the FA cases, various abnormalities were detected by the MR studies in all three DA cases. An intimal flap and a double lumen were demonstrated in one case. An intra-mural hematoma was shown in one case. A hematoma neighboring the parent artery was demonstrated in two cases. MR imaging was thought to be useful for detecting intracranial vascular lesions, such as a DA, and for discriminating between a DA and a FA.
Insights
Magnetic resonance imaging (MRI) effectively detects abnormalities in vertebro-basilar dissecting aneurysms (DA), distinguishing them from fusiform aneurysms (FA). MRI reveals specific features like intimal flaps and hematomas in DA, unlike the subtle findings in FA.
Area of Science:
- Neurology
- Radiology
- Vascular Surgery
Background:
- Vertebro-basilar aneurysms are critical vascular lesions.
- Differentiating between dissecting aneurysms (DA) and fusiform aneurysms (FA) is crucial for treatment.
- Magnetic resonance (MR) imaging is a key diagnostic tool in neurovascular assessment.
Observation:
- This study compared MR findings in three cases of vertebro-basilar DA with two cases of FA.
- Patients with FA showed only arterial dilatation on MR images.
- Patients with DA exhibited diverse abnormalities on MR imaging.
Findings:
- MR imaging identified intimal flaps and double lumens in one DA case.
- Intra-mural hematomas were visualized in one DA case.
- Hematomas adjacent to the parent artery were detected in two DA cases.
Implications:
- MR imaging is valuable for diagnosing intracranial vascular lesions like DA.
- MRI aids in differentiating between DA and FA based on characteristic findings.
- Accurate differentiation impacts clinical management and patient outcomes for vertebro-basilar aneurysms.