OTOPALATODIGITAL SYNDROME TYPE I: NOVEL CHARACTERISTICS AND PRENATAL MANIFESTATIONS IN TWO SIBLINGS
Joksic I1,*, Cuturilo G2,3, Jurisic A1,2, Djuricic S4,5, Peterlin B6, Mijovic M2, Karadzov Orlic N1,2, Egic A1,2, Milovanovic Z1,2
*Corresponding Author: Ivana Joksic, M.D., Ph.D., Gynecology and Obstetrics Clinic “Narodni Front”, Kraljice Natalije 62, 11000 Belgrade, Serbia. Tel: +381-64-128-7643. Fax: +381-11-334-9651. E-mail: ivanajoksic@yahoo.com
page: 83
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Abstract

Otopalatodigital spectrum disorder (OPDSD) is rare group of X-linked disorders caused by mutations in the filamin A (FLNA) gene. It is characterized by skeletal dysplasia of variable severity and different extra skeletal manifestations. Its presentation in the fetal period is quite unspecific, so diagnosis is usually made after birth. We present prenatal ultrasonography and postmortem findings that led us to a diagnosis of the mildest form of OPDSD (OPD type I) in two consecutive pregnancies. This is the first report on prenatal diagnosis (PND) of OPD type I. Affected fetuses showed facial dysmorphy (hypertelorism, micrognathia, cleft palate) and digital anomalies, features typical of OPD type I. In addition, microphtalmia and early neonatal death due to severe respiratory distress syndrome are described as a novel characteristics of the disorder. Clinical exome sequencing revealed a hemizygous missense pathogenic variant in the FLNA gene (NM_ 001110556.1: c.620C>T). We suggest that the presence of hypertelorism, micrognathia, digital anomalies on prenatal ultrasound examination should alert suspicion to OPDSD. Detailed clinical examination of mother and other female relatives is of great importance in establishing definitive diagnosis of OPD type I.



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