Doctor insights on:
Mosaic Down Syndrome Symptoms
Many criteria: 1. Epicanthic folds give the superficial impression of mongoloid appearance. 2. A staight across palmar crease like that of an ape so it is called a symian crease.3. Obvious developmental delay.4.Often a tongue that seems to be too big for mouth.
Accounts for 1% DS: Mosaicism is encountered in ds patients & I have followed one in the past. By definition, some tissues are composed of cells with normal information & other tissues have the abnormal, but the mix could vary greatly in the percentage of either. Functional outcome depends on that blend & whether the abnormally derived tissues compose critical structures like brain, blood, reproductive organs, etc.
Down's syndrome: Delayed maturation of brain & body, result in small chin, oblique eye fissures with skin folds on inner corners of the eyes, flat nasal bridge, poor muscle tone, protruding tongue, flat face, short neck, lax joints, larger space between big toe & second toe, short fingers, short stature & bowed legs, obesity as they grow older.
Long story!: The problem is duplication of genetic material (chromosome 21) in every cell of the body. There are facial features, heart problems, reduced muscle tone, and spinal, gi, ent, thyroid and blood-related issues as well. The biggest issue is mental deficiency. Ongoing surveillance and intervention by your pediatrician are important. So is developmental and school-based help.
Facial character: It is typically associated with a delay in cognitive ability (mental retardation, or mr) and physical growth, and a particular set of facial characteristics. The average iq of young adults with down syndrome is around 50, whereas young adults without the condition typically have an iq of 100.
Many: Down syndrome patients may have prominent tongue, joint laxity and hypotonia, congenital heart defects, hyper or hypothyroidism, gastrointestinal issues including aspiration and ge reflux, neurologic mental retardation, constipation and hirschsprung's disease, congenital bowel issues (bowel atresias). Some with mild symptoms and findings and others more severe.
See NIH website: See: www. Nchi. Nlm. Nih. Gov/pubmedhealth/pmh0001992/ for a full review. Down syndrome results when a kid is born with too much chromosome material in his/her cells which confuses the system & results in anomalies & poor development. It cannot be fixed, but outcome can be improved with attention to associated problems.
Maternal serum: Screening at 10-14 weeks + fetal ultrasound (fus) at 11-14 weeks + maternal "quad" screen at 16 weeks detects ~ 95% of fetuses with down syndrome with <5% false-positive rate. Increased size of the fluid-filled space at the nape of the neck & abnormalities of blood flow in the heart are signs on early fus. Diagnostic testing is chorionic villus sampling at 10-12 weeks or amnio at 15-18 weeks.See 1 more doctor answer
Why do you ask?: You're going to need labs to determine this. Please forgive my frankness. Having a child with possible Down's is an extremely serious business and anyone who would trivialize this by saying, "Let's skip the labs that will establish the diagnosis" is doing both the child and the family a grave disservice.See 1 more doctor answer
Is there a type of mosaic Down syndrome that doesn't require the mutation to come from either parent to have a downs child?
Yes: A mosaic down syndrome child can come from a normal egg and normal sperm, produced by normal parents. The fertilized egg would start out normal with 46 chromosomes. It can divide into 2 normal cells, which themselves divide again. If on one of the early divisions, one cell ends up with an extra #21 chromosome and survives to continue dividing, the child will be mosaic with some trisomy 21 cells.See 1 more doctor answer
Multiple symptoms: Down syndrome can have multiple congenital heart disease which includes atrial septal defect, hypoplastic left ventricle, tetrology of fallot, transposition of great vessels and ventricular septal defect. Some defects can have very few or no sign and symtoms while other may have bluish tinted nails or lips or fast or trouble or others may tire easily when feedind, or to be very sleepy.
I am doing a presentation for my class on down syndrome and I need to know why it isn't dominant or recessive. P.S. I need a simplified answer
Seek info here: Lots of HT doctors have answered this for others - here's a start. Just dig a bit further, but it's a good reply. Source: HealthTap, https://edc1.healthtap. Com/user_questions/22610See 1 more doctor answer
Chromosome defect: Ds is one of the more common chromosome (c) defects that can survive pregnancy (many others miscarry).Eggs are supposed to have a single 21c & combine with the 21 from dads normal sperm.Here a pair of moms 21c +dad's 21 creates a baby with the extra 21c in all tissues. This extra material confuses the creation of body parts causing ds. Various prenatal tests can pick up signs early on.
DNA defects: Chromosome 21 seems to be the cause. Two most common types are trisomy 21 where ther is an entire extra chromosome in each cell. The other is translocation where only an extra piece of the chromosome is found. It can be an isolated defect or an inherited defect. Rare exotic forms include polyploidy and haploid forms and chimeras. Sorry you asked?See 1 more doctor answer
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