Prediction of residual trophoblastic tissue in first-trimester abortions and low levels of human chorionic gonadotropin beta-subunit.
The clinical data and the histologic report of curettage specimens of 174 patients with first-trimester abortion and human chorionic gonadotropin beta-subunit less than 500 mIU/ml were reviewed. In only 22 (12.6%) were chorionic villi histologically reported. A multivariate analysis showed that increased log human chorionic gonadotropin beta-subunit levels within the range of 20 to 500 mIU/ml, intrauterine tissue demonstrated by ultrasonography, higher gestational age, and active bleeding were significant predictive variables for the presence of villi in curettage specimens. A mathematical formula and a clinical scoring system for the prediction of residual villi in these cases were devised and were applied to the data of our study group. The sensitivity, false-negative rate, and specificity of the scoring system were 90.9%, 2.2%, and 59.2%, respectively; however, the false-positive rate was 75.6%. By use of this scoring system in patients with first-trimester abortion and low human chorionic gonadotropin beta-subunit level, the presence of villi in curettage specimens can thus be predicted with a high sensitivity and as many as 60% of curettage procedures might be prevented.
Schiff
E
E
Department of Obstetrics and Gynecology, Sheba Medical Center, Sackler School of Medicine, Tel Aviv University.
Ben-Baruch
G
G
Moran
O
O
Yahal
I
I
Oelsner
G
G
Mashiach
S
S
Menczer
J
J
D000028:Abortion, Induced; D000328:Adult; D006063:Chorionic Gonadotropin / Q000097:blood; D003656:Decidua / Q000473:pathology; D004107:Dilatation and Curettage; D005260:Female; D005544:Forecasting; D006801:Humans; D008871:Microvilli / Q000648:ultrastructure; D012189:Retrospective Studies; D014327:Trophoblasts / Q000648:ultrastructure*; D014599:Uterus / Q000473:pathology
D006063:Chorionic Gonadotropin