Key result
Reverse boomerang sign identifies fetal TGA during first-trimester screening.
Why the study?
Early prenatal screening for transposition of great arteries (TGA) lacks specific sonographic markers during the first trimester.
Does the reverse boomerang sign on first-trimester ultrasound identify transposition of great arteries?
Case Report (n=6)
Does the reverse boomerang sign on first-trimester ultrasound identify transposition of great arteries?
The reverse boomerang sign on first-trimester ultrasound may serve as a useful early marker for the prenatal diagnosis of transposition of the great arteries.
Answers are grounded in this paper and cite their sources.
May facilitate earlier prenatal diagnosis of transposition of the great arteries; leaves open validation in prospective cohorts.
OBJECTIVE: To describe a new sonographic marker of transposition of great arteries (TGA) during the first-trimester screening. METHODS: We reviewed six cases of TGA from 2013 to 2016 in which an antenatal diagnosis of TGA at first-trimester screening (11-13 + 6 weeks of gestation) was confirmed postnatally. We specifically assessed images obtained by scanning the fetal heart in three vessels (3V) and three-vessel with trachea (3VT) views using color Doppler. The "reverse boomerang" sign was defined as a reverse curvature of right ventricle outflow tract (RVOT) at level of the 3VT view. RESULTS: We described six cases of confirmed TGA, five singletons and one twin pregnancy, among which only two vessels and the reverse curvature of RVOT (reverse boomerang sign) was demonstrated in the first-trimester screening at level of 3VT view. Ventricular septal defects were observed in three cases, and double outlet right ventricle in one case. No other cardiac or extracardiac anomalies were identified. Termination of pregnancy was not performed in any case. CONCLUSION: Our series case suggests that the reverse boomerang sign may improve the early prenatal screening for TGA.
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Bravo‐Valenzuela et al. (2017) conducted a case report in Transposition of great arteries (TGA) (n=6). Reverse boomerang sign on first-trimester ultrasound was evaluated on Presence of the reverse boomerang sign. The reverse boomerang sign on first-trimester ultrasound was demonstrated in 6 cases of confirmed transposition of great arteries, suggesting its utility for early prenatal screening.
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