Calcified yolk sac

A calcified yolk sac has been described as a sign of intrauterine demise. The cause of yolk sac calcification in failed pregnancies is uncertain but is likely related to dystrophic calcification.

Radiographic features

  • abnormal increased echogenicity of the yolk sac with posterior acoustic shadowing and possibly comet tail artefact

Practical points 

  • indeterminate abnormal yolk sac abnormality that should not be considered alone for the diagnosis of failed early pregnancy 
  • follow-up ultrasonography at 7-14 days to assess the pregnancy for viability is generally appropriate


Article information

rID: 32679
System: Obstetrics
Synonyms or Alternate Spellings:

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