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An unruptured arteriovenous malformation with edema
1Department of Neurosurgery, Kitasato University School of Medicine, Kanagawa, Japan.
AJNR. American Journal of Neuroradiology
|February 1, 1994
Summary
We describe an unruptured arteriovenous malformation with significant perilesional edema on MRI. This finding suggests edema can compress brain tissue adjacent to the malformation.
Area of Science:
- Neurology
- Neuroradiology
- Neuroimaging
Background:
- Arteriovenous malformations (AVMs) are complex vascular anomalies.
- Unruptured AVMs can present with varied imaging characteristics.
- Understanding perilesional changes is crucial for AVM management.
Observation:
- A case of an unruptured AVM was examined.
- T2-weighted Magnetic Resonance (MR) imaging revealed an extensive zone of increased signal intensity adjacent to the AVM nidus.
- This hyperintense signal area exerted a compressive effect on surrounding brain parenchyma.
Findings:
- The observed perilesional hyperintense signal on T2-weighted MR is suggestive of edema.
- This edema was extensive and adjacent to the AVM nidus.
- The edema demonstrated a compressive effect on the adjacent brain tissue.
Implications:
- Perilesional edema may be a significant finding in unruptured AVMs.
- Edema can cause mass effect, mimicking other intracranial pathologies.
- Further research is needed to understand the pathophysiology and clinical significance of edema in AVMs.