Prenatal diagnosis of Smith-Lemli-Opitz syndrome based on recognition of fetal ambiguous genitalia in association with congenital heart disease

Julia Murlewska; Sławomir Witkowski; Agnieszka Gach; Maria Respondek-Liberska; Iwona Strzelecka

doi:10.5114/pcard.2023.135889

eISSN: 2449-6731
ISSN: 2449-6723

Prenatal Cardiology

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abstract:

Case report

Prenatal diagnosis of Smith-Lemli-Opitz syndrome based on recognition of fetal ambiguous genitalia in association with congenital heart disease

Julia Murlewska

¹

,

Sławomir Witkowski

¹

,

Agnieszka Gach

²

,

Maria Respondek-Liberska

^{1, 3}

,

Iwona Strzelecka

^{1, 3}

Department of Prenatal Cardiology, Polish Mother’s Memorial Hospital – Research Institute, Lodz, Poland
Department of Genetics, Polish Mother’s Memorial Hospital – Research Institute, Lodz, Poland
Department of Diagnoses and Prevention of Fetal Malformations, Medical University of Lodz, Poland

Prenat Cardio 2023; 13 (1): 51-55

DOI: https://doi.org/10.5114/pcard.2023.135889

Online publish date: 2024/03/04

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Smith-Lemli-Opitz syndrome (SLOS) is an autosomal recessive disease caused by a mutation in the 7-dehydrocholesterol reductase gene (DHCR7) on chromosome 11, which leads to 7-dehydrocholesterol reductase enzyme defects. This results in the building up of toxic by-products of cholesterol production in the blood and the nervous system. All this affects the growth and development of human body systems. We presented a case of a fetus of a pregnant woman with a high-risk pregnancy after IVF. The patient was referred for a fetal karyotype test, which showed a male sex (46, XY). This woman was referred to our centre for fetal heart evaluation. Based on our protocol established at the Department of Prenatal Cardiology of the Institute of the Polish Mother’s Health Centre in Lodz, our examination starts with obstetrical screening, including ultrasound fetal gender evaluation. At this point of examination, the fetus presented ambiguous genitalia and fetal polydactyly. The fetal echocardiographic examination revealed atrioventricular septal defect. The presence of ambiguous genitalia and atrioventricular septal defect allowed us to suspect SLOS. As a result, further diagnostic steps were suggested, and the diagnosis was confirmed. The family chose comfort care with no postnatal intervention and planned the next pregnancy with another donor. We would like to underline the importance of a detailed ultrasound protocol before fetal echocardiographic examination for its proper interpretation.

keywords:

Prenatal diagnosis of Smith-Lemli-Opitz syndrome based on recognition of fetal ambiguous genitalia in association with congenital heart disease

Julia Murlewska 1 , Sławomir Witkowski 1 , Agnieszka Gach 2 , Maria Respondek-Liberska 1, 3 , Iwona Strzelecka 1, 3

SLOS, prenatal cardiology, genetics, prenatal diagnosis, heart defects, fetal genitalia, ambiguous genitalia

Julia Murlewska

¹

,

Sławomir Witkowski

¹

,

Agnieszka Gach

²

,

Maria Respondek-Liberska

^{1, 3}

,

Iwona Strzelecka

^{1, 3}