MRI of adenomyosis: changes with uterine artery embolization.

Objective: Our objective was to describe the MRI features of patients with pure or dominant adenomyosis treated with uterine artery embolization (UAE) and to correlate imaging features with symptoms.

Subjects And Methods: Nineteen patients with symptomatic pure or dominant adenomyosis on MRI were referred for UAE. All 19 patients had repeat MRI 4 months after UAE. The MR images obtained before and after UAE were evaluated for maximal junctional zone thickness, junctional zone-myometrial ratio, uterine volume, and the presence of avascular regions. Patients were asked to complete a questionnaire about their symptoms before and 3 and 12 months after UAE.

Results: Uterine volume decreased significantly after UAE (p < 0.01). The mean uterine volume reduction was 25.1%. Junctional zone thickness decreased significantly (p < 0.001). The junctional zone-myometrial ratio did not decrease significantly (p = 0.526). Fourteen (73.7%) of the 19 patients showed devascularized change within the adenomyotic region. Eighteen patients completed a questionnaire at 3 months. Sixteen (88.9%) of the 18 reported an improvement in symptoms, whereas the two remaining patients (11.1%) reported no change (p < 0.001). Of the 16 patients with clinical improvement, 11 had devascularized areas after UAE and five did not. Eleven of the 18 patients who completed a questionnaire 3 months after UAE also completed a questionnaire 12 months after UAE. Ten of these 11 patients still reported continued improvement, and one patient reported a worsening of symptoms.

Conclusion: UAE in patients with pure or dominant adenomyosis results in decreased uterine volume and regions of devascularization. Most patients reported an improvement in clinical symptoms within 3 months after UAE. Some patients reported benefit for at least 1 year; however, the long-term durability of symptomatic relief remains unknown.