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Yeungnam Univ J Med > Volume 22(2); 2005 > Article
Yeungnam University Journal of Medicine 2005;22(2):241-246.
DOI: https://doi.org/10.12701/yujm.2005.22.2.241    Published online December 31, 2005.
A Case of Constitutional Trisomy 8 Mosaicism.
Hee Soon Cho, Chae Hoon Lee, Kyoung Dong Kim, Eun Sil Lee
1Department of Laboratory Medicine, College of Medicine, Yeungnam University, Daegu, Korea. chlee@med.yu.ac.kr
2Department of Pediatrics, College of Medicine, Yeungnam University, Daegu, Korea.
Abstract
Constitutional trisomy 8 is a relatively rare aneuploidy; most identified cases are mosaic with a normal cell line. The phenotype is highly variable from apparently normal to severe disability. The proportion of abnormal cells is dramatically different between tissues and the severity of the phenotype is not directly related to the level of mosaicism. Therefore, it is very difficult to provide a definitive prognosis. We report here a case of constitutional trisomy 8 mosaicism with agenesis of the corpus callosum, congenital heart disease and micrognathia. The trisomy 8 cell line was not detected by prenatal cytogenetic study. This is the fourth reported case of constitutional trisomy 8 mosaicism in Korea.
Key Words: Constitutional trisomy 8, Mosaicism, Agenesis of the corpus callosum


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