An adverse event after high-intensity focused ultrasound treatment.

Sagittal T2-weighted images (A, B, E) and contrast-enhanced T1-weighted images (C, D) of a 46-year-old woman with adenomyosis (arrowhead). (A) Before HIFU treatment. (B, C) Increased signal intensity and enhancement along the anterior wall of the upper rectum adjacent to the adenomyosis was detected in the immediate posttreatment images (arrows). Her symptoms improved after conservative management, and she was discharged. (D, E) At the 1-month follow-up, the signal intensity of the rectal wall was normalized (arrow). Note the shrinkage of the treated adenomyosis (arrowhead).