An autoimmune neurologic case reported refractory myoclonic and autonomic episodes despite GABAergic treatment. The later response to dexmedetomidine remained a single-patient observation.
The documented progression
The patient had painful sound- or touch-triggered spasms that progressed despite intravenous diazepam and oral clonazepam. The course evolved to hyperekplexia, opisthotonus, autonomic episodes, and apnea requiring ventilation.
The authors identified glycine-receptor-antibody-positive progressive encephalomyelitis with rigidity and myoclonus. They reported a marked response to dexmedetomidine after conventional symptomatic medicines and immunotherapy had been insufficient.
Response is not a comparative trial
The case involved severe disease and several simultaneous or sequential treatments. It cannot determine a general success rate for dexmedetomidine or establish that benzodiazepines had no partial benefit.
The report supports preserving neurologic diagnosis, trigger pattern, respiratory events, and the entire treatment timeline. It does not establish that every refractory spasm is a seizure, benzodiazepine withdrawal, or a reason to use the same rescue regimen. Mechanistic explanations remain hypotheses requiring broader evidence.
Source paper
Original analysis of the supplied journal article, identified as PMC8311021.
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