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Isodicentric 15

Background

Isodicentric 15: idic (15)

Isodicentric 15 is a rare chromosomal disorder (see the Chromosome Abnormalities section in Patterns of Inheritance). Individuals with idic (15) have an extra chromosome made up of some material from the 15th pair of chromosomes. This means that there are forty-seven chromosomes (or occasionally forty-eight or forty-nine) in these cells rather than 46. The extra piece of chromosome 15 has been duplicated end-to-end like a mirror image and is referred to as an 'isodicentric 15', an 'inverted duplication 15', or a 'supernumerary marker.'

What are the symptoms? View What are the symptoms?

Medical text last updated October 2002. Written by Contact a Family and approved by Dr N Dennis, Senior Lecturer in Clinical Genetics and Hon. Consultant Clinical Geneticist, Princess Anne Hospital, Southampton, UK.

 

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