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Korean Journal of Obstetrics & Gynecology 2005;48(5):1358-1361.
Published online May 1, 2005.
A Case of Prenatally Diagnosed Jacobsen syndrome.
Jae Hee Yoon, So Ra Kim, Woo In Lee, In Gu Do, Bo Yeon Lee, Seon Kyung Lee, Chu Yeop Huh, Seung Bo Kim
1Department of Obstetrics and Gynecology, College of Medicine, Kyunghee University, Seoul, Korea. andy2155@korea.com
2Department of Laboratory Medicine, College of Medicine, Kyunghee University, Seoul, Korea.
3Department of Pathology, College of Medicine, Kyunghee University, Seoul, Korea.
Jacobsen syndrome is a rare condition associated with the deletion of the long arm of chromosome 11. Though several authors reported prenatal sonographic findings of the Jacobsen syndrome, there are no common disease-specific features. The majority of affected cases were identified postnatally by chromosomal analysis of the dysmorphic or mentally retarded patients. We present a prenatal case of Jacobsen syndrome with a brief review of literature. A routine scanning in a 32-year-old primigravida at 17.3 weeks' gestation showed abnormal ultrasonographic findings consistent with increased nuchal thickening and subtle cardiac abnormalities (levorotated heart axis of greater than 60 degrees and thickened ventricular wall). The patient underwent amniocentesis, and the karyotype showed deletion of the long arm of chromosome 11, 46,XX, del (11) (q23.1q24). The fetal autopsy performed following medical termination confirmed the prenatal findings. The present case represents that the prenatal sonographic detection of the nuchal thickening and subtle cardiac abnormality should warrant a careful assessment of fetal anatomy and prompt cytogenetic analysis looking for chromosomal aberrations.
Key Words: Jacobsen syndrome, Chromosome 11q deletion, Prenatal diagnosis, Ultrasound

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