Qualificated discrimination of ovarian malignancy by diagnostic ultrasound.
Ultrasonograms of 214 ovarian masses in 184 patients were studied to discriminate ovarian malignancies from benign masses and to help in developing a new scoring system using ultrasonographic findings with weight-adjusted scores. The 76 masses that showed cystic patterns only were directly determined to be benign, having an expected success rate of 97.4%. The remaining 138 masses, of which 116 showed mixed patterns and 22 of which showed solid patterns, were analyzed by the Quantification method No. 2 of Hayashi to select the effective ultrasonic findings and to obtain a good discriminant function. Eleven findings (items) expressing 29 categories were selected, and a discriminant function composed with a weight-adjusted score for each category was obtained as the result of the analysis. Using these functions, the 86.6% of the ovarian masses with mixed or solid patterns were correctly discriminated as being malignant, borderline-malignant, or benign. According to internal checks of all ovarian masses, the success rate was 90.2%. Then 73 ovarian masses of 65 new patients were discriminated as the external check, and a success rate of 93.2% was obtained. It is concluded that this newly developed scoring system using ultrasonic findings is useful in discriminating ovarian malignancies from benign ones.
Department of Obstetrics and Gynecology, Okayama University Medical School, Japan.
T
T
Hirai
N
N
Akamatsu
K
K
Sekiba
N
N
Tsubota
S
S
Tsuru
D000465:Algorithms; D003937:Diagnosis, Differential; D016002:Discriminant Analysis; D005260:Female; D006801:Humans; D010049:Ovarian Diseases / Q000000981:diagnostic imaging; D010051:Ovarian Neoplasms / Q000000981:diagnostic imaging*; D014463:Ultrasonography