from Genetic Syndromes and Phakomatoses
Published online by Cambridge University Press: 07 August 2021
Patau syndrome (PS) or trisomy 13 is a chromosomal disorder caused by the presence of an extra copy of chromosome 13 in some or all cells. The syndrome was first described and reported in 1960 by a German-born American geneticist Klaus Patau [1, 2]. It is the third most common autosomal trisomy. Fetal death occurs in 15% of clinically recognized pregnancies with trisomy 13. The prevalence of PS varies from 1:12,000 to 1:29,000 newborns [1, 3]. Pregnancies with trisomy 13 are usually terminated after the diagnosis is confirmed as fetuses are commonly born with multiple congenital malformations and postnatal survival is short [1, 3]. The syndrome is slightly more common in females, with a ratio to males of 1:0.88 [4]. Older maternal age is a recognized risk factor for this pathology due to the higher frequency of nondisjunction in meiosis leading to trisomy 13 compared to younger mothers [1].
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