Proposed spectrum of opioid syndromes
| Clinical Data | Imaging Findings | |
|---|---|---|
| CHANTER | Decreased level of consciousness in adults, cerebellar edema leading to obstructive hydrocephalus, mixed prognosis | Cerebellar edema with hippocampal and basal ganglia involvement on DWI |
| POUNCE | Decreased level of consciousness in children, cerebellar edema leading to obstructive hydrocephalus, poor prognosis | Cerebellar edema without hippocampal and basal ganglia involvement on DWI, more WM involvement with T2 hyperintensity |
| OAA | New-onset amnesia, mild prognosis | Symmetric diffusion restriction and FLAIR hyperintensity of the hippocampi |