In uterine artery embolization (UAE) for symptomatic fibroids, the embolization material of choice currently is:

• A Absolute alcohol (ethanol)
• B Calibrated microspheres (polyvinyl alcohol microspheres or tris-acryl gelatin microspheres) ✓
• C Coils (metal microcoils)
• D Gelfoam (absorbable gelatin sponge)

Explanation

Calibrated microspheres (polyvinyl alcohol microspheres or tris-acryl gelatin microspheres, 500-900 µm) are the current standard embolic agent for UAE. They provide precise size-matched occlusion of the uterine arteries feeding fibroids while preserving normal myometrial perfusion, optimizing fibroid infarction and reducing non-target embolization. Absolute alcohol causes unpredictable tissue necrosis and is used for ablation of tumors and AVMs. Gelfoam provides temporary embolization and is not suitable for permanent fibroid treatment. Coils are too proximal and would prevent re-treatment.

Reference: Grainger & Allison's Diagnostic Radiology, 7th ed.

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Written and medically reviewed by the StethoPrep medical team.