Purpose: To determine the accuracy of endovaginal ultrasound (US) in the diagnosis of uterine adenomyosis and to evaluate the frequency of observed sonographic criteria.
Materials and methods: Endovaginal US was performed in 100 consecutive women undergoing hysterectomy for a variety of benign and malignant conditions. Adenomyosis was diagnosed when a poorly defined area of abnormal echotexture (decreased or increased echogenicity, heterogeneous echotexture, myometrial cysts) was present in the myometrium. All endovaginal US findings were correlated with those from histologic examination.
Results: Endovaginal US depicted 25 of 29 pathologically proved cases of adenomyosis. Adenomyosis was correctly ruled out in 61 of 71 patients. Endovaginal US had a sensitivity of 86%, a specificity of 86%, and a positive and negative predictive value of 71% and 94%, respectively. Of the 25 patients with true-positive findings at US, the myometrium demonstrated heterogeneous and hypoechoic areas with or without the presence of cysts in 21 (84%) patients, hypoechoic areas with cysts in three (12%) patients, and heterogeneous areas within the myometrium in one (4%) patient.
Conclusion: Adenomyosis of the uterus can be accurately diagnosed with endovaginal US with use of specific sonographic criteria.