Bilateral vs Unilateral MMAE for Unilateral cSDH: No Difference in Retreatment Rate

In 600 patients with unilateral chronic subdural hematoma, bilateral middle meningeal artery embolization had 0% index-admission surgical rescue vs 9.5% for unilateral (p=0.99), with no overall retreatment difference.

• Other outcomes, including postdischarge retreatment, did not differ significantly between bilateral and unilateral groups.
• The study identifies angiographically documented contralateral dural supply as a candidate marker for future prospective evaluation.

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