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Chiari II malformation
  1. Helen Williams
  1. Correspondence to Dr Helen Williams, Radiology Department, Birmingham Children's Hospital, Birmingham B4 6NH, UK; helen.williams{at}bch.nhs.uk

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This 6-year-old boy had repair of a myelomeningocele and insertion of a ventriculoperitoneal shunt shortly after birth. He is under regular follow-up, including MRI to monitor a spinal cord syrinx and he also has headaches. Look at the midline T1-weighted image from his cranial MR scan (figure 1), and answer the following questions. Read on to confirm the answers and learn more about this condition.

Figure 1

Questions

  1. The cerebellar tonsils are herniated below the foramen magnum. True or false?

  2. Cerebrospinal fluid (CSF) spaces at the craniocervical junction are normal in size. True or false?

  3. The posterior fossa is relatively small. True or false?

  4. The corpus callosum is normal. True …

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