Document Detail

Sonographic comparison of the tubal ring of ectopic pregnancy with the corpus luteum.
MedLine Citation:
PMID:  14756354     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Pregnant patients without a sonographically visible intrauterine pregnancy and with a thick-walled cystic adnexal structure present a dilemma. This study compared the utility of various sonographic features in differentiating between the tubal ring of ectopic pregnancy and the corpus luteum. METHODS: Retrospective review of first-trimester transvaginal sonograms revealed a cystic adnexal structure in 79 women. Each structure was evaluated for 6 specific sonographic characteristics: echogenicity of its wall compared with that of the ovary and endometrium, wall thickness in 2 planes, color Doppler flow distribution and percentage of wall circumference, and internal texture. RESULTS: Forty-one (52%) of the 79 women had ectopic pregnancies, and 38 (48%) had corpora lutea. Eleven (32%) of 35 ectopic walls were more echogenic than the endometrium, compared with none of the corpora lutea. A cyst wall less echogenic than the endometrium was more likely in corpora lutea (84% versus 31%; P < .0001). More than twice as many ectopic rinds were more echogenic than ovarian tissue compared with corpora lutea (76% versus 34%; P < .0001). The only predictive internal texture feature was a clear pattern, which was more common in the corpora lutea (P < .01, Fisher exact test). There was no significant difference in mural flow distribution or extent between the 2 groups. CONCLUSIONS: Ancillary sonographic signs to distinguish between an ectopic pregnancy and a corpus luteum include decreased wall echogenicity compared with the endometrium and an anechoic texture, which suggests a corpus luteum.
Marjorie W Stein; Zina J Ricci; Leon Novak; Jeffrey H Roberts; Mordecai Koenigsberg
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine     Volume:  23     ISSN:  0278-4297     ISO Abbreviation:  J Ultrasound Med     Publication Date:  2004 Jan 
Date Detail:
Created Date:  2004-02-03     Completed Date:  2004-05-17     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8211547     Medline TA:  J Ultrasound Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  57-62     Citation Subset:  IM    
Department of Radiology, Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, New York 10467, USA.
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MeSH Terms
Chi-Square Distribution
Corpus Luteum / ultrasonography*
Diagnosis, Differential
Pregnancy Trimester, First
Pregnancy, Ectopic / ultrasonography*
Retrospective Studies
Ultrasonography, Doppler, Color
Ultrasonography, Prenatal*

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