4th March 2024

A 34-year-old female attended her obstetrician following an abnormality seen on her 20-week anomaly scan

A 34-year-old female attended her obstetrician following an abnormality seen on her 20-week anomaly scan. She reported that her pregnancy, up to this point, had been unremarkable with no apparent issues. She had no previous health issues and had one successful pregnancy before this without any prenatal, perinatal or postnatal complications. She had refused her combined screening test at 11 weeks. An amniocentesis was performed, and this confirmed the presence of trisomy 13.

Which of the following abnormalities is most likely to have been detected on her anomaly scan?

Select the SINGLE most appropriate option from the list below. Select ONE option only.