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Chiari II malformation

Case contributed by Arthur Daire
Diagnosis certain

Presentation

Child with a midline lower thoracic - upper lumbar spinal defect. MRI for further investigation.

Patient Data

Age: 11 months
Gender: Male
mri

Brain:

  1. tonsillar herniation, 15mm below foramen magnum

  2. small posterior fossa

  3. hydrocephalus: extensive

  4. absent corpus callosum

Spine:

  1. large thoracolumbar cystic mass with cord and nerve root within it (myelomeningocele)

  2. syringomyelia in mid-thoracic cord

  3. no tethered cord

Case Discussion

The findings are consistent with Chiari II malformation.

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