Cystic hygromas that develop in the third trimester, after thirty weeks gestation, or in the postnatal period are usually not associated with chromosome abnormalities.
22.
:: : : First, Turner syndrome is most certainly an exception to the generalization that sex chromosome abnormalities are less harmful than autosomal ones.
23.
A small proportion of humans have a non-standard number of chromosomes, usually due to a chromosome abnormality such as Down Syndrome or Turner syndrome.
24.
Advances in cytogenetics facilitated discovery of chromosome abnormalities in neoplasms, including the Philadelphia chromosome in chronic myelogenous leukemia and translocations in acute myeloblastic leukemia.
25.
Typically, autism cannot be traced to a Mendelian ( single-gene ) mutation or to single chromosome abnormalities such as fragile X syndrome or 22q13 deletion syndrome.
26.
Various registries, which keep track of chromosome abnormalities and their clinical implications, had been consulted, but he was not aware of any other case like ours.
27.
Perhaps further studying of ring chromosomes and diseases, from the perspective of neocentromere formation, may shed light on mechanisms of tumor formation due to chromosome abnormalities.
28.
Filkins has studied a combination finger-stick blood test and ultrasound test designed to locate signs of chromosome abnormalities that could indicate Down syndrome or trisomy 18.
29.
CPCs are often called " soft signs " or fetal ultrasound " markers " because some studies have found a weak association between CPCs and fetal chromosome abnormalities.
30.
If DeCode finds the same chromosome abnormality in people who are not related but do have the disease, that makes an even stronger case to investigate the suspect region.
