From the case:
Parietal foramina
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The parietal foramina are well demonstrated on this 3D volume rendered CT image. They appear as round defects of the parietal bone near the intersection of sagittal and lambdoid sutures.
Case Discussion
This image has been made available under the Creative Commons Attribution-Share Alike 4.0 International licence thanks to JasonRobertYoungMD.
The source image is available at https://en.wikipedia.org/wiki/File:Parietal_Foramen.PNG
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