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Abstract #1276

18q- Brain Development with Age and the Effect of Deletion Size

Xi Tan 1 , Jannine Cody 2 , and Jack L Lancaster 1

1 Research Imaging Institute, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States, 2 Department of Pediatrics, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States

18q- is a chromosomal disease. People with 18q- miss part of the long arm (q arm) of one copy of chromosome 18. Since people with 18q- are typically mental retarded and developmental delayed, this study investigated whole brain volume, grey matter volume and white matter volume development on the age rang 0-25 years old, and the linear effect of deletion size on the these volumes. It proved that deletion size have a negatively linear effect on these volumes, and 18q- volumes grow quicker to reach equilibrium volumes, but their equilibrium volumes are smaller than normally developed control subjects.

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