Concurrence of ring 21 and trisomy 21 in children of normal parents.

Yonsei Med J

Department of Laboratory Medicine, Chonbuk National University Medical School and Research Institute of Clinical Medicine, Chonbuk National University, 634-18 Keumam-dong, Dukjin-gu, Jeonju 561-712, Korea.

Published: April 2005

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Article Abstract

We present a case of two siblings with different chromosome 21 abnormalities that are both de novo [r(21)/i(21p13) mosaicism and rob(14;21)]. Molecular studies using polymorphic markers have shown that these two aberrations had a common maternal origin. However, the parents were cytogenetically and phenotypically normal. This unusual association has not been reported and is considered to be a unique case that should be addressed.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2823026PMC
http://dx.doi.org/10.3349/ymj.2005.46.2.284DOI Listing

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