Ultrasonographic Scoring System for Preoperative Discrimination Between Benign and Malignant Ovarian Tumors

Abstract

Objective To evaluate ultrasonographic scoring system for preoperative discrimination between
benign and malignant ovarian tumors.
Design Prospective study.
Setting Department of Obstetrics and Gynecology, Bangkok Metropolitan Administration
Medical College and Vajira Hospital.
Material and methods 218 women scheduled for elective surgery for ovarian tumors between
May, 1999 and December, 2001 were recruited into the study. Ultrasonographic assessments
were performed using Ferrazi’s scoring system within 72 hours before surgery by the same
gynecologist to evaluate wall, septa, vegetations, and echogenicity of the tumors. The final
diagnosis was pathologically confirmed as the gold standard.
Results 173 ovarian tumors were benign and 45 were malignant. The best cut-off value from
reciever operating characteristic curve was 9. This value had sensitivity 88.89% (95% CI 76.50-
95.20), specificity 91.91% (95% CI 86.90-95.10). The positive and negative predictive values
were 74.07% (95% CI 61.10-83.90) and 96.95% (95% CI 93.10-98.70), respectively.
Conclusion Ultrasonographic scoring system shows high diagnostic accuracy in discriminating
benign from malignancy ovarian tumors.