trisomy Chromosome 16

A chromosomal abnormality characterized by a third copy of chromosome 16. Full trisomy 16 is lethal in utero and is the most common chromosomal trisomy that results in miscarriage. Mosaic trisomy 16, where affected individuals carry an extra chromosome 16 only in some tissues, may result in intrauterine growth retardation and congenital heart defects.

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