Inclusion Criteria:  planning to undergo an abdominal, laparoscopic, or robotic-assisted hysterectomy due to benign conditions uterus < 16 weeks gestational size if undergoing a laparoscopic or robotic procedure (no size limit for patients planning to undergo a transabdominal hysterectomy) at least one area of focal or diffuse adenomyosis or adenomyomas that is/are contralateral to any fibroids as determined by MRI able to provide informed consent suitable candidates for surgery (have passed a standard pre-operative health assessment) English speaking  Exclusion Criteria:  require emergent hysterectomy or vaginal hysterectomy have a uterus > 16 weeks gestational size if undergoing a laparoscopic or robotic procedure (no size limit for patients planning to undergo a transabdominal hysterectomy) have fibroids in the proximity of the target adenomyosis (same side, similar location) are not appropriate surgical candidates as determined during pre-operative health assessment are unable or unwilling to undergo a hysterectomy are pregnant or lactating are under the age of 18 years have active pelvic inflammatory disease have a history of gynecologic malignancy within the past 3 years are unable to give informed consent have an implantable uterine or fallopian tube device for contraception are not English speaking