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Reversible opisthotonus following intracranial pressure changes in Chiari malformation
1Department of Neurosurgery, Hadassah University Hospital, Jerusalem, Israel.
Insights
A child with myelodysplastic syndrome and Chiari II malformation experienced shunt malfunction and opisthotonus. Addressing cerebrospinal fluid overdrainage is key to resolving brainstem dysfunction in these complex pediatric cases.
Area of Science:
- Pediatric Neurosurgery
- Neurology
- Developmental Neuroscience
Background:
- Myelodysplastic syndrome (MDS) can be associated with congenital neurological abnormalities.
- Chiari II malformation is a complex structural defect affecting the brainstem and cerebellum.
- Shunt placement is common for managing hydrocephalus in these conditions.
Observation:
- A pediatric patient with shunted myelodysplastic syndrome and Chiari II malformation presented with shunt malfunction and opisthotonus.
- Initial improvement after correcting distal obstruction was followed by cerebrospinal fluid (CSF) overdrainage.
- Recurrence of opisthotonic posture indicated persistent neurological compromise.
Findings:
- Shunt malfunction and subsequent CSF overdrainage can unmask or exacerbate lower brainstem dysfunction.
- Intracranial pressure fluctuations (hyper- or hypotension) significantly impact brainstem function in Chiari II malformation.
- The interplay between CSF dynamics and brainstem integrity is critical in pediatric neurosurgical cases.
Implications:
- Accurate management of CSF dynamics is crucial for preventing secondary neurological deficits in children with Chiari II malformation.
- Understanding the mechanisms of brainstem dysfunction related to CSF pressure is vital for optimizing neurosurgical interventions.
- This case highlights the importance of monitoring CSF pressure in shunted pediatric patients with complex malformations.
Abstract:
A shunted myelodysplastic child with Chiari II malformation presented with shunt malfunction and opisthotonus. Correction of a distal obstruction lead to an initial improvement followed by overdrainage of cerebrospinal fluid and repetition of an opisthotonic posture. The possible mechanisms which unmask lower brainstem dysfunction in Chiari malformation when intracranial hyper- or hypotension exist, are discussed.