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Sonographic diagnosis of partial hydatidiform mole
C Fine1, A L Bundy, R S Berkowitz
1Department of Radiology, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts.
Obstetrics and Gynecology
|March 1, 1989
Summary
Ultrasound can help differentiate partial hydatidiform mole from missed abortion. Key ultrasound findings, including gestational sac dimensions and decidual/myometrial changes, predict partial mole likelihood before procedures.
Area of Science:
- Obstetrics and Gynecology
- Diagnostic Imaging
- Reproductive Medicine
Background:
- Distinguishing partial hydatidiform mole from missed abortion is crucial for appropriate management.
- First-trimester ultrasound is commonly used in early pregnancy assessment.
Purpose of the Study:
- To evaluate the effectiveness of ultrasound in differentiating partial hydatidiform mole from first-trimester missed abortion.
- To identify specific sonographic criteria associated with partial hydatidiform mole.
Main Methods:
- Retrospective review of ultrasound scans from 22 partial hydatidiform mole and 33 missed abortion cases.
- Three radiologists independently assessed gestational sac dimensions, contents, decidual/myometrial appearance, and adnexal cysts.
- Analysis of two key criteria: gestational sac dimension ratio and cystic/echogenic changes in surrounding tissues.
Main Results:
- A gestational sac transverse to anteroposterior dimension ratio > 1.5 and cystic/echogenic changes in the decidual reaction/placenta or myometrium were significantly associated with partial mole (P < .05).
- High interobserver agreement was observed for these criteria.
- When both criteria were met, partial mole was diagnosed in 87% of cases; when neither was met, missed abortion was diagnosed in 90%.
Conclusions:
- Ultrasound can predict a high likelihood of partial hydatidiform mole prior to surgical management.
- Specific sonographic features can aid in differentiating partial mole from missed abortion, improving diagnostic accuracy.