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1. Cutis aplasia congenita

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Figure 26-1

Cutis aplasia congenita.

There is an area of scalp thinning and irregularity (arrow) in this 3-month-old infant. Normal subcutaneous fat signal is lacking at the site on this T1-weighted sagittal image. The underlying skull and dura are intact.

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2. Scaphocephaly

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Figure 26-2

Scaphocephaly.

A. The skull of this 29-day-old infant has an elongated configuration due to sagittal craniosynostosis. There is posterior bulging of the upper aspect of the occipital bone. B. The frontal view confirms bony bridging across a portion of the sagittal suture (arrow). The lambdoid and coronal sutures are wide.

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3. Trigonocephaly; metopic craniosynostosis

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Figure 26-3

Trigonocephaly; metopic craniosynostosis.

A. An anterior brow-down 3D CT view of a 9-month-old infant shows undergrowth of the frontal bones and a midline frontal ridge. B. An axial image demonstrates the triangular configuration of the thickened frontal bones. There is no visible metopic suture.

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4. Synostotic plagiocephaly

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Figure 26-4

Synostotic plagiocephaly.

An anterior-superior (brow down) 3D CT view of a 10-month-old infant shows closure and ridging of the left coronal suture (arrow). There is calvarial asymmetry, with undergrowth of the ipsilateral frontal bone and outward bulging of the right frontal and parietal bones. There is no anterior fontanelle.

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5. Sagittal craniosynostosis

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Figure 26-5

Sagittal craniosynostosis.

A posterior oblique 3D CT image of a 2-month-old child with scaphocephaly shows fusion of the sagittal suture (arrows) and slight bony ridging at the site of the fused suture.

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6. Coronal craniosynostosis

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Figure 26-6

Coronal craniosynostosis.

A. A right anterior oblique 3D CT image of a 3-month-old infant with plagiocephaly shows premature closure of the caudal segment of the right coronal suture (arrow). There is a bony ridge along the fused portion of the suture. B. The right orbit has an elongated oval configuration, and there is elevation of the right sphenoid bone. There is mild facial bone asymmetry.

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7. Coronal craniosynostosis

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Figure 26-7

Coronal craniosynostosis.

A reformatted CT image of an infant with unilateral right coronal synostosis shows marked elevation of the right orbital roof due to frontal bone undergrowth.

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