Diploid-triploid mosaicism

How is diploid-triploid mosaicism diagnosed?

For most individuals with diploid-triploid mosaicism, the triploid cells are restricted to certain tissues. Most often, the triploid cells are not detected in a chromosome analysis (karyotype) of the blood. The cells may only be detected in skin fibroblasts. Thus, the diagnosis may only be confirmed by a skin biopsy or the investigation of urinary cells.

Last updated on 05-01-20

What is diploid-triploid mosaicism?

Diploid-triploid mosaicism is a chromosome disorder. Individuals with diploid-triploid syndrome have some cells with three copies of each chromosome for a total of 69 chromosomes (called triploid cells) and some cells with the usual 2 copies of each chromosome for a total of 46 chromosomes (called diploid cells). Having two or more different cell types is called mosaicism. Diploid-triploid mosaicism can be associated with truncal obesity, body/facial asymmetry, weak muscle tone (hypotonia), delays in growth, mild differences in facial features, fusion or webbing between some of the fingers and/or toes (syndactyly) and irregularities in the skin pigmentation. Intellectual disabilities may be present but are highly variable from person to person ranging from mild to more severe. The chromosome disorder is usually not present in the blood; a skin biopsy, or analyzing cells in the urine is needed to detect the triploid cells.

Last updated on 05-01-20

Name: Chromosome Disorder Outreach CDO PO Box 724
Boca Raton, FL, 33429 , United States
Phone: +1-561-395-4252 Email: https://chromodisorder.org/contact/ Url: https://chromodisorder.org/
Name: Unique – Rare Chromosome Disorder Support Group G1, The Stables Station Road West
Surrey RH8 9EE
United Kingdom
Phone: +44 (0)1883 723356 Email: info@rarechromo.org Url: https://www.rarechromo.org/

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