Chromosome 6 - Maternal Disomy

What is Chromosome 6 - Maternal Disomy?

Chromosome 6 - Maternal Disomy is a rare disease.
There are currently no additional known synonyms for this rare genetic disease.

Cockwell et al., (2006) reported a 23 week gestation fetus with a mosaic trisomy 6 in fibroblasts and amnion, with a normal karyotype in the other cells. These appeared to have a maternal UPD6 at molecular analysis. The authors assumed the phenotype was caused by the mosaic trisomy 6 (q.v.). Van den Berg-Loonen et al., (1996) reported a mat UPD6 detected by coincidence in a family of a renal transplant patient during HLA analysis, and another case was detected in the work-up of a case with congenital adrenal hyperplasia (Spiro et al., 1999). This latter patient had also a prenatal growth retardation and developmental delay, but it was undetermined whether this was related with the mat UPD6.

* This information is courtesy of the L M D.

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What gene changes cause Chromosome 6 - Maternal Disomy?

The syndrome is inherited in the following inheritance pattern/s:

Disomy - Normally we inherit one copy of each chromosome pair from each biological parent. In the case of disomy, both copies of the chromosome pair are received from one parent and none from the other. This is also often known as uniparental disomy. With most genes, this is not an issue, and will not cause any medical or health issues. However when specific genes are concerned, issues with genomic imprinting can cause specific genetic syndromes.

In some cases, a genetic syndrome may be the result of a de-novo mutation and the first case in a family. In this case, this is a new gene mutation that occurs during the reproductive process.

The syndrome can be caused by mutations in the following gene/s location/s:

What are the main symptoms of Chromosome 6 - Maternal Disomy?

The typical symptoms of the syndrome are:

How does someone get tested for Chromosome 6 - Maternal Disomy?

The initial testing for Chromosome 6 - Maternal Disomy can begin with facial genetic analysis screening, through the FDNA Telehealth telegenetics platform, which can identify the key markers of the syndrome and outline the type of genetic testing needed. A consultation with a genetic counselor and then a geneticist will follow.

Based on this clinical consultation with a geneticist, the different options for genetic testing will be shared and consent will be sought for further testing.

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