子宮体癌に対する経腟走査超音波断層法とMRIの有用性について―筋層浸潤と頚部浸潤の評価―

Between October, 1988 and March, 1991, twenty-mine patients with endometrial carcinoma bad both transvaginal ultrasonography (TVUS) and magnetic resonance imaging (MRI) performed following hysterectomy at the Departmetn of Gynecology and Obstetrics, Okayama University Medical School. The findings were compared with the pathological findings to determine the usefulness of each method. The sensitivity of dectecthing myometrial invasion was 100% by TVUS and 96% by MRI. The accuracy was 86% by each method. The depth of myometrial invasion was classified into 3 degrees [no myometrial invasion, superficial invasion (≤1/2), deep invasion (>1/2)]. The correct diagnostic rate was 86% by TVUS and MRI. The minimum width and the minimum/maximum width ratio of the intact myometrium obtained by each method in the pathological deep invasion group were significantly lower than those obtained in the other two groups (p<0.01). The sensitivity, the accuracy and the specificity of detecting cervical invasion were 89%, 93% and 95% by both methods. There was no difference between TVUS and MRI for diagnosing myometrial and cerical invasion of endometrial carcinoma.