Loss of the extra chromosome 21 in a patient with Down syndrome and myelodysplasia.

Cancer Genet Cytogenet

Department of Hematology, Singapore General Hospital, Outram Road, Singapore 169608, Republic of Singapore.

Published: January 2008

Monosomy 21 is a rare acquired karyotypic abnormality associated with myeloid disorders. Occurrence of loss of one chromosome 21 in the background of trisomy 21 in Down syndrome, resulting in the pseudo-normalization of trisomy 21, is a novel finding. The case is described of a patient with Down syndrome who acquired such a genetic abnormality as a result of myelodysplastic syndrome.

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http://dx.doi.org/10.1016/j.cancergencyto.2007.09.019DOI Listing

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