Scoring system in the graphic diagnosis of ovarian tumors

To evolve the diagnostic accuracy and the practical utility of ultrasonography and computed tomography, the images from 244 ovarian tumors including 33 non-neoplasms, 75 benign tumors, 14 tumors of low potential malignancy and 122 malignant tumors were analysed by means of the quantitative concept II and scored. The results from the scoring methods were compared with the final diagnosis confirmed histologically by surgery. The following results were obtained: 1. The accuracy of preoperative diagnosis was 68.3% for ultrasound examination, 81.2% for CT scanning and 87.5% the combination of both tests. 2. False diagnosis occured in two LPM tumors and three benign ones (1 teer cyst and 2 cystadenomas). Such false results are presumably caused by difficulty in determining tissue character of these tumors by the present imaging techniques. 3. Based on the evaluation of CT numbers, differential diagnosis between benign and malignant ovarian tumors may be aided by the use of contrast enhanced CT numbers at the fluid portion of tumors. 4. CT scanning alone could diagnose all 23 dermoid cysts with 100% accuracy. (author)