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Chapter 21

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1. Linear skull fracture

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Figure 21-1

Linear skull fracture.

A lateral radiograph of a 18-month-old child shows a linear parietal skull fracture (arrows). The fracture stops at the coronal suture.

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2. Ping-pong ball fracture

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Figure 21-2

Ping-pong ball fracture.

CT of a 2-week-old infant following a fall shows inward buckling of a portion of the left parietal bone (arrow). There is no lucent fracture line or fragment separation.

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3. True depressed skull fracture

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Figure 21-3

True depressed skull fracture.

A. Overlapping of the fracture margins results in a dense band (arrow) on this lateral radiograph. B. CT confirms the presence of a fracture, with inward displacement of the anterior component.

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4. Flat depressed skull fracture

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Figure 21-4

Flat depressed skull fracture.

Two intracranially displaced fragments of the parietal bone are visible on this axial CT image.

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5. True depressed fracture

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Figure 21-5

True depressed fracture.

An axial CT image shows a mildly depressed fracture and an accompanying subperiosteal hematoma (arrow).

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6. Basilar skull fracture

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Figure 21-6

Basilar skull fracture.

A longitudinal fracture (arrows) extends through the petrous portion of the left temporal bone, foramen ovale, and greater wing of the sphenoid bone.

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7. Basilar skull fracture

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Figure 21-7

Basilar skull fracture.

A transverse fracture through the sphenoid bone involves the sphenoid sinus (arrow) and right orbital wall. There is pneumocephalus.

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8. Epidural hematomas in 3 children.A

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Figure 21-8

Epidural hematomas in 3 children.A.

This biconvex extraaxial blood collection has a predominantly isoattenuating character due to the presence of hyperacute hemorrhage. There is an adjacent skull fracture. B. This right frontal hematoma has the typical biconvex configuration that is characteristic of an epidural location. C. There is marked mass effect associated with this left parietal epidural hematoma.

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9. Epidural hematoma

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Figure 21-9

Epidural hematoma.

The dura appears as a thin hypointense band (arrow) at the inner margin of the epidural blood collection on this T2-weighted MR ...

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