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Table 1 Differential diagnosis of dystonic storm

From: Dystonic storm: a practical clinical and video review

Entity Age Trigger Time course Movement disorder phenomenology Other neuro signs Altered mental status Autonomic instability
Dystonic storm P +/− Hours-Days Dystonia +/− chorea +
Choreic storm P-YA +/− Hours-Days Chorea
Oculogyric crisis All +++ Acute Dystonia Oculogyria +/−
Neuroleptic malignant syndrome A +++ Days-Weeks Parkinsonism + +
Serotonin syndrome All +++ Hours-Days Myoclonus + +
Lethal catatonia All +/− Hours-Days Parkinsonism + +
Malignant hyperthermia All +++ Acute
Drug intoxication All +++ Acute Psychosis + +/−
Intrathecal baclofen withdrawal P-YA +++ Acute-Hours + +
Delirium tremens A +++ Acute Myoclonus Psychosis + +
Autoimmune encephalitis (e.g. anti-NMDA) P-YA Days-Weeks Chorea Psychosis + +
  1. This table provides the list of differential diagnosis of dystonic storm. Useful distinguishing features include age group (pediatric, young adult, adult and all), presence or absence of triggering factors (number of “+” sign correlates with stronger relationship; “+/−” represents inconsistent correlation; “−” represents no correlation), time course, movement disorder phenomenology, associated neurological signs, altered mental status and autonomic instability
  2. Abbreviations: P pediatric, YA young adults, A adults, All all age groups