Correct Answer : Turner syndrome
Explanation :
Redundant nuchal skin is a typical finding in neonates with Turner syndrome and trisomies such as Down syndrome
When Turner’s syndrome is diagnosed prenatally, the diagnosis is usually based on the finding of fetal edema on ultrasonography; abnormal levels of human chorionic gonadotropin, unconjugated estriol, and alpha-fetoprotein on screening of maternal serum (triple screening); or abnormal results of fetal karyotyping performed because of advanced maternal age. Affected fetuses often abort spontaneously. A 45,X fetus identified prenatally and surviving to birth has a prognosis similar to that of a child in whom Turner’s syndrome is diagnosed postnatally. In contrast, approximately 90 percent of fetuses in whom 45,X/46,XX or 45,X/46,XY mosaicism is diagnosed incidentally during the course of screening for advanced maternal age or maternal triple screening will likely have a normal phenotype, female or male, respectively, at birth
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