A to Z: Trisomy 21enparentshttps://kidshealth.org/EN/images/headers/P-khAZDictionary-enHD-AR1.jpgSee: Down Syndrome.Down syndrome, DS, Trisomy 21, translocation, mosaicism, chromosomes, extra chromosome, chromosome 21, flat facial profile, slanted eyes, low muscle tone, small stature, developmental delays, congenital heart defects08/09/201304/11/201904/11/20197bd1280d-50bc-4b05-8a23-2984b694d50chttps://kidshealth.org/ws/RadyChildrens/en/parents/az-trisomy.html/<p>See: <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/az-down.html/">Down Syndrome</a>.</p>kh:age-allAgesOrAgeAgnostickh:clinicalDesignation-developmentalMedicinekh:clinicalDesignation-geneticskh:genre-dictionarykh:primaryClinicalDesignation-geneticsThttps://kidshealth.org/ws/RadyChildrens/en/parents/dictionary/t/43c185a2-6bf4-4283-b27b-c17577050c89