Recognizing the unique prenatal phenotype of Prader-Willi Syndrome (PWS) indicates the need for a diagnostic methylation test.

Prenatal Diagnosis
Naama SrebnikTalia Eldar-Geva

Abstract

Prader-Willi syndrome (PWS) is a neurogenetic disorder characterized by mental retardation, morbid obesity, and endocrine and behavior disorders. We previously showed in a small group of patients that PWS may have a unique prenatal phenotype. We aimed to characterize clinical and ultrasonic features in a larger series of pregnancies with a PWS fetus. We retrospectively interviewed all mothers of children with PWS followed in the Israel national multidisciplinary PWS clinic. We compared details of the PWS pregnancy with the pregnancies of healthy siblings and with data from the general population. Medical records including ultrasound reports, obstetric records, and genetic results were analyzed. Distinct prenatal features of PWS pregnancies included abnormal fetal growth [fetal growth restriction (FGR) (37.3%), increased head to abdominal circumference ratio (44.8%), decreased abdominal circumference (49.2%)], markedly decreased fetal movements (DFM) (80.4%), and polyhydramnios (42.0%) (P < 0.001 for all). The combination of abnormal growth accompanied by polyhydramnios or DFM was highly suggestive for PWS. Recognition of the unique PWS phenotype should alert obstetricians to consider the possibility of PWS, perform the diagnost...Continue Reading

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Citations

Mar 2, 2021·The Lancet. Diabetes & Endocrinology·Maithé Tauber, Charlotte Hoybye
Mar 17, 2021·Expert Review of Endocrinology & Metabolism·Alessandro SalvatoniMassimo Agosti
Oct 17, 2021·The Journal of Obstetrics and Gynaecology Research·Kuntharee TraisrisilpTheera Tongsong

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