Calcified yolk sac
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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
artifactartefact
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
-<p>A <strong>calcified yolk sac</strong> has been described as a sign of intrauterine demise. The cause of <span style="line-height:20.7999992370605px"> </span><span style="line-height:1.6"><a title="Yolk sac" href="/articles/yolk-sac">yolk sac </a>calcification in failed pregnancies is uncertain, but is likely related to dystrophic calcification.</span></p><h4>Radiographic features</h4><h5>Ultrasound</h5><ul><li>abnormal increased echogenicity of the yolk sac with posterior acoustic shadowing and possibly <a href="/articles/comet-tail-artifact-2">comet tail artifact</a>-</li></ul>- +<p>A <strong>calcified yolk sac</strong> has been described as a sign of intrauterine demise. The cause of <a href="/articles/yolk-sac">yolk sac </a>calcification in <a title="Failed early pregnancy" href="/articles/failed-early-pregnancy">failed pregnancies </a>is uncertain but is likely related to dystrophic calcification.</p><h4>Radiographic features</h4><h5>Ultrasound</h5><ul><li>abnormal increased echogenicity of the yolk sac with posterior acoustic shadowing and possibly <a href="/articles/comet-tail-artifact-2">comet tail artefact</a>
- +</li></ul><h4>Practical points </h4><ul>
- +<li>indeterminate abnormal yolk sac abnormality that should not be considered alone for the diagnosis of <a href="/articles/failed-early-pregnancy">failed early pregnancy</a> </li>
- +<li>follow-up ultrasonography at 7-14 days to assess the pregnancy for viability is generally appropriate</li>
- +</ul><p> </p>
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