Osmotic Myelinolysis with Malignant Cerebellar Edema Occurring after DDAVP-Induced Hyponatremia in a Child
Bibliographic record
Abstract
Central pontine myelinolysis (CPM) and extrapontine myelinolysis (EPM) are dire neurological disorders, characterized by severe damage to the myelin sheath of neurons, which typically result from rapid correction or overcorrection of systemic hyponatremia. For many years, both conditions have been considered universally fatal, though survivors have been reported more recently. Pediatric cases are rare. We present a 13-year-old boy with panhypopituitarism secondary to repair of a nasofrontal encephalocele in infancy, managed on long-term corticosteroid, deamino arginine vasopressin and thyroid hormone. He presented with severe hyponatremia (116 mEq/l), which during correction rapidly and unexpectedly increased to 176 mEq/l, resulting in profoundly impaired consciousness. Brain imaging revealed multiple bilateral changes in the basal ganglia, thalamus, pons and cerebral white matter, consistent with both CPM and EPM. Malignant cerebellar edema necessitated emergent suboccipital craniectomy, with subsequent improvement in level of consciousness and imaging postoperatively. However, he succumbed to acute cardiorespiratory arrest 8 weeks later. Nine similar cases from the literature are reviewed.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.003 | 0.001 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.003 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".