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The mean epigenetic age of the five pure Syndrome X subjects was 6.7 years (standard error=1.0) which is not significantly different from the mean chronological age of 6.3 years (standard error=1.8). Notably, the oldest pure Syndrome X case had an epigenetic age of 14.5 years which was 3.2 years older than her true chronological age.
Fragile X syndrome (FXS) is a genetic neurodevelopmental disorder characterized by mild-to-moderate intellectual disability. [1] The average IQ in males with FXS is under 55, while about two thirds of affected females are intellectually disabled.
Blepharophimosis, ptosis, epicanthus inversus syndrome; Blind loop syndrome; Bloom syndrome; Blount's disease; Blue baby syndrome; Blue diaper syndrome; Blue rubber bleb nevus syndrome; Blue toe syndrome; Bobble-head doll syndrome; Body fat redistribution syndrome; Boerhaave syndrome; Bogart–Bacall syndrome; Bohring–Opitz syndrome; Bonnet ...
Syndrome X may refer to: Groups of symptoms, so called as placeholder name, when newly discovered: Cardiac syndrome X; Metabolic syndrome; Neotenic complex syndrome, such as identified in Brooke Greenberg; Acute radiation syndrome, upon its recognition in 1945
XY complete gonadal dysgenesis, also known as Swyer syndrome, is a type of defect hypogonadism in a person whose karyotype is 46,XY. Though they typically have normal vulvas , [ 1 ] the person has underdeveloped gonads, fibrous tissue termed " streak gonads ", and if left untreated, will not experience puberty .
Turner syndrome (TS), commonly known as 45,X, or 45,X0, [note 1] is a chromosomal disorder in which cells have only one X chromosome or are partially missing an X chromosome (sex chromosome monosomy) leading to the complete or partial deletion of the pseudoautosomal regions (PAR1, PAR2) in the affected X chromosome.
Trisomy X, also known as triple X syndrome and characterized by the karyotype [note 1] 47,XXX, is a chromosome disorder in which a female has an extra copy of the X chromosome. It is relatively common and occurs in 1 in 1,000 females, but is rarely diagnosed; fewer than 10% of those with the condition know they have it.
XYY syndrome, also known as Jacobs syndrome, is an aneuploid genetic condition in which a male has an extra Y chromosome. [1] There are usually few symptoms. [ 2 ] These may include being taller than average and an increased risk of learning disabilities .