BMJ Case Reports 2013; doi:10.1136/bcr-2012-007941
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Short-term surviving sirenomelia neonate followed by a complex mesodermal malformation in a sibling

  1. Fabrizio Signore1
  1. 1Department of Obstetrics and Gynaecology, San Camillo Forlanini Hospitals, Rome, Italy
  2. 2Department of Anatomical Pathology, San Camillo Forlanini Hospitals, Rome, Italy
  1. Correspondence to Dr Fabrizio Signore, fsignore{at}


A surviving sirenomelia with renal agenesis was followed by a caudal mesodermal malformation in a subsequent pregnancy.

A 29-year-old prediabetic overweight woman was diagnosed with fetal sirenomelia after an MRI study following an inconclusive ultrasound at the 28th week of pregnancy. Caesarean section was performed for fetal distress at the 37th week gestation. The neonate had a cardiac arrest after 32 h. The final diagnosis was sirenomelia with renal agenesis and other midline defects (figure 1). The patient got pregnant again …

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