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Case report
Paternal uniparental disomy for chromosome 14: prenatal management
  1. Joana Isabel Igreja da Silva1,
  2. Barbara Ribeiro1,
  3. Alexandra Cadilhe1 and
  4. Cristina Nogueira-Silva1,2
  1. 1Department of Obstetrics and Gynecology, Braga Hospital, Braga, Portugal
  2. 2Life and Health Sciences Research Institute, School of Medicine, University of Minho, ICVS 3B’s Associate Laboratory, Braga, Portugal
  1. Correspondence to Dr Joana Isabel Igreja da Silva; joanaigreja87{at}


We present a case of a 34-year-old multiparous woman who had been diagnosed with a 14 weeks’ gestation showing an abdominal wall bulge possibly representing an omphalocele, containing liver and intestinal loops, at her first-trimester ultrasound scan. At 16 weeks’ gestation, an amniocentesis was performed and karyotype analysis revealed a balanced Robertsonian translocation between chromosomes 13 and 14 in a female fetus (45,XX,der(13;14)(q10;q10)). Given this result and ultrasound findings, karyotype and molecular study of the couple were suggested. The results pointed out the absence of maternal contribution to the analysed regions by paternal uniparental disomy for chromosome 14 (isodisomy), which is associated with a severe phenotype. The correlation between ultrasound findings and the genetic study is primordial to guide the diagnostic assessment and to establish the prognosis of the fetal pathology.

  • genetic screening / counselling
  • pregnancy
  • ultrasonography

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  • Contributors JIIdS and BR followed the case. AC was responsible for ultrasound examinations and management of the case. JIIdS was responsible for writing the manuscript. BR was responsible for figures formatting. CN-S revised the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.