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1. Astrocytoma

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Figure 24-1

Astrocytoma.

A, B. This oval neoplasm (arrows) of the cervical cord is hypointense on the T1-weighted image (A) and hyperintense on the T2-weighted image (B).

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2. Spinal cord glioblastoma

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Figure 24-2

Spinal cord glioblastoma.

This 11-year-old boy presented with lower extremity paraplegia and incontinence. A. A sagittal T2-weighted MR image shows poorly defined signal alteration and slight enlargement of the inferior aspect of the cord. Central hyperintensity in the mid-thoracic region is due to edema. B. There is hyperintensity throughout this portion of the lumbar cord on a T2-weighted axial image. C. Enhancement of this poorly defined infiltrative tumor (arrows) is predominantly peripheral on this sagittal fat-suppressed T1-weighted sequence with IV gadolinium.

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3. Astrocytoma

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Figure 24-3

Astrocytoma.

A. A sagittal T2-weighted image of a 6-year-old child demonstrates a large hyperintense expansile lesion of the spinal cord (arrows). There is adjacent perilesional edema. B. The tumor undergoes somewhat heterogeneous contrast enhancement on this T1-weighted image obtained after gadolinium administration.

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4. Astrocytoma, low grade

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Figure 24-4

Astrocytoma, low grade.

This 10-year-old girl presented with a 5-week history of progressively worsening back pain and mild lower extremity weakness. A. There is a heterogeneous lumbar cord mass on this T2-weighted image. B. A fat-suppressed T2-weighted image shows hyperintense edema throughout the spinal cord and into the inferior aspect of the medulla. C. The tumor is slightly hypointense on T1-weighted imaging. D. There is intense, heterogeneous contrast enhancement. The tumor has an eccentric location along the dorsal aspect of the cord.

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5. Astrocytoma

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Figure 24-5

Astrocytoma.

A sagittal T2-weighted image of a child with neurofibromatosis type 1 shows a small hyperintense cervical cord mass (arrow). There is an eccentric anterior location.

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6. Pilomyxoid astrocytoma

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Figure 24-6

Pilomyxoid astrocytoma.

A. This low-grade tumor has an oval configuration and well-defined borders on this T2-weighted sagital image. This 17-month-old child presented with left extremity weakness. B. The axial T1-weighted image shows an eccentric location within the cord. The tumor is hypointense to normal cord on this sequence.

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7. Paraspinal plexiform neurofibroma

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Figure 24-7

Paraspinal ...

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