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  • Title: Detection of cleft lip by early second-trimester transvaginal sonography.
    Author: Bronshtein M, Blumenfeld I, Kohn J, Blumenfeld Z.
    Journal: Obstet Gynecol; 1994 Jul; 84(1):73-6. PubMed ID: 8008328.
    Abstract:
    OBJECTIVE: To describe the detection of cleft lip in the early second trimester using transvaginal sonography. METHODS: We analyzed retrospectively 14,988 ultrasound examinations conducted for fetal malformations between 12-16 weeks' gestation. Seventy-five percent of the patients were at low risk for fetal anomalies and 25% were at high risk. RESULTS: Eleven cases of fetal cleft lip with or without cleft palate were detected by transvaginal sonography among 14,988 fetuses (0.07%). In nine cases, no risk factors for cleft lip or palate existed. In six cases, the cleft lip represented an isolated malformation, with no other associated anomaly; in five of these six cases, the pregnancy was terminated. One additional case of a small cleft lip was not detected, for a false-negative rate of 8%. CONCLUSIONS: The fetal lips can be scanned by transvaginal sonography in the early second trimester, and fetal cleft lip can be detected in most cases. Early second-trimester detection of cleft lip by transvaginal sonography allows informed parental choice regarding continuing or terminating the affected pregnancy.
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