mosaic Down syndrome

GPTKB entity

Statements (26)
Predicate Object
gptkbp:instanceOf genetic disorder
gptkbp:alsoKnownAs mosaic trisomy 21
gptkbp:causedBy presence of an extra chromosome 21 in some cells
gptkbp:complication congenital heart defects
increased risk of leukemia
thyroid disorders
vision problems
hearing loss
gptkbp:diagnosedBy karyotype analysis
gptkbp:firstDescribed 1959
gptkbp:frequency rare compared to standard Down syndrome
gptkbp:geneticMechanism nondisjunction during cell division after fertilization
https://www.w3.org/2000/01/rdf-schema#label mosaic Down syndrome
gptkbp:inheritance not inherited
gptkbp:prevalence 2-4% of Down syndrome cases
gptkbp:prognosis variable, often milder than typical Down syndrome
gptkbp:riskFactor advanced maternal age
gptkbp:subspecies gptkb:Down_syndrome
gptkbp:symptom distinct facial features
hypotonia
intellectual disability
developmental delays
gptkbp:treatment supportive care
early intervention programs
gptkbp:bfsParent gptkb:trisomy_21
gptkbp:bfsLayer 6