Recognition of the clinical features of Trisomy 13 syndrome, a common autosomal trisomy, provides the basis for diagnostic testing and counseling of families. This article provides a systematic ...

Symmetric intrauterine growth restriction (both weight and head circumference below the 10th percentile) is usually seen in Trisomy 13. [2] Evaluate the eyebrows. Occasionally, synophrys ...

Dandy-Walker syndrome has been found to occur most often in children who have an extra copy of chromosome 18 (trisomy 18). However, Dandy-Walker is not exclusive to children with trisomy 18, nor does ...

Among 19 autopsied cases of 17–18 trisomy syndrome, 10 confirmed by cytogenetic studies, nine diagnosed on the basis of phenotypic characteristics, seven cases of neonatal hepatitis were found ...

If you get a negative result, there's less than a 1% chance that your baby has Down syndrome. For Trisomy 18, the negative result accuracy is 97.7%, and for Trisomy 13 it's 96.1%. If you get a ...

There is also an apparent "bump" in trisomy among teenage girls. This slight increase has also been observed in several studies of Down syndrome, and might reflect a tendency to non-disjoin in the ...