Prenatal diagnosis and neonatal phenotype of a de novo microdeletion of 17p11.2p12 associated with Smith–Magenis syndrome and external genital defects

Smith–Magenis syndrome (SMS, OMIM: 182290) is a multiple congenital anomalies and intellectual disability syndrome due to a 3.45 Mb microdeletion involving 17p11.2 and is estimated to occur about one in 25,000 births. Up to now, the ultrasound findings of the foetus with SMS and their external genital defects in patients are rarely reported. This case indicates that foetus with SMS may present polyhydramnios and ventriculomegaly in the second trimester. The newborn male patient had an abnormal phenotype in which he has micropenis and his anus is close to the perineal body. The identification of this case may further expand the phenotypic spectrum of this genetic disorder.

Keywords

chr17p11.2p12 deletion, prenatal diagnosis, neonatal phenotype, Smith–Magenis syndrome, SNP array

Citation

Pingping Zhang, Yanmei Sun, Tian Haishen, Rong Limin, Wang Fangna, Yu Xiaoping, Li Yali, Gao Jian. Prenatal diagnosis and neonatal phenotype of a de novo microdeletion of 17p11.2p12 associated with Smith–Magenis syndrome and external genital defects. Journal of Genetics. 2020 Jun; 99: 1-6

URI

https://imsear.searo.who.int/handle/123456789/215511

Collections

Journal of Genetics

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