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Clinical timeline.
| Time | Events |
|---|---|
| 1 month prior | Withdrawal, crying, reduced speech |
| 2 weeks prior | Hyperactivity, insomnia, inappropriate laughter |
| 3 days prior | Delusions, hallucinations, incoherent texting |
| Day 0 | ED presentation |
| Days 1–3 | First steroid pulse |
| Day 7 | Second steroid pulse |
| Months 1–8 | Monthly IVIG |
| Months 9–14 | Maintenance therapy |
| Months 15–17 | Medication taper, full recovery |
