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Association between increased yolk sac diameter and abnormal karyotypes.
MedLine Citation:
PMID:  22505502     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Abstract Aims: To investigate the association between increased yolk sac diameter and abnormal karyotype. Methods: Retrospective analysis of 42 patients with no history of diabetes between 6 and 12 weeks of gestation with increased yolk sac diameter measuring ≥6mm was evaluated by transvaginal ultrasound. Sonographic findings were correlated with karyotype. The Fisher's exact test and exact conditional logistic regression analysis were used for statistical analysis. Results: Chromosome abnormalities were found in 76.2% of chorionic villi samples. A statistically significant relationship between karyotype and missed abortion was detected (P=0.001). None of the patients with a yolk size diameter ≥8mm and viable pregnancy had a normal karyotype. Trisomy 15 or 16 was strongly associated with missed abortion (unadjusted odds ratio=14.97, P=0.01). Nine patients with viable pregnancy had a yolk sac ≥6mm (six patients with normal karyotype, one patient with monosomy X, one patient with trisomy 16, and one patient with trisomy 21). Conclusion: Our data indicate that enlarged yolk sac may also be visualized in viable pregnancies. Patients with an enlarged yolk sac and normal karyotype require detailed ultrasound evaluation in the second and third trimester.
Authors:
Ksenija Gersak; Alenka Veble; Zuber D Mulla; Sanja Kupesic Plavsic
Publication Detail:
Type:  Journal Article     Date:  2012-01-10
Journal Detail:
Title:  Journal of perinatal medicine     Volume:  40     ISSN:  1619-3997     ISO Abbreviation:  J Perinat Med     Publication Date:  2012  
Date Detail:
Created Date:  2012-04-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0361031     Medline TA:  J Perinat Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  251-4     Citation Subset:  IM    
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