Calcified yolk sac
Last revised by Dr Daniel J Bell ◉ on 29 Nov 2021
Citation, DOI & article data
Citation:
Morgan, M., Bell, D. Calcified yolk sac. Reference article, Radiopaedia.org. (accessed on 18 Aug 2022) https://doi.org/10.53347/rID-32679
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rID:
32679
Article created:
09 Dec 2014 by Dr Matt A. Morgan ◉
Revisions:
11 times by 7 users - see full revision history
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Synonyms:
- Calcified yolk sacs
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
Ultrasound
- abnormal increased echogenicity of the yolk sac with posterior acoustic shadowing and possibly comet tail artifact
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
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References
- 1. Harris RD, Vincent LM, Askin FB. Yolk sac calcification: a sonographic finding associated with intrauterine embryonic demise in the first trimester. Radiology. 1988;166 (1): 109-10. doi:10.1148/radiology.166.1.3275964 - Pubmed citation
- 2. Sinan Tan. Sonographic Evaluation of the Yolk Sac. JUM. 2012;31 (1): 87-95. JUM (full text)
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