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UFE maybe tried for a single big fibroid, however the biggest drawback is that the myoma would not be removed and hence, would be unavailable for histopathology or biopsy examination.
Biopsy is the gold standard for ruling out any kind of malignant possibility within the fibroid.
Given the earlier sonogram results, I feel it would be more reassuring for you to have the fibroid itself removed ( your concerns for an entire formal hysterectomy are valid, but just a myomectomy could be done ), and have the biopsy report stating that there is nothing to worry.
I hope this has helped.
Feel free to follow up.