Neuroleptic Malignant Syndrome/Malignant Catatonia in Child Psychiatry: Literature Review and a Case Series.

OBJECTIVE: To describe the presentation of neuroleptic malignant syndrome (NMS) and malignant catatonia (MC) in children and adolescents.

BACKGROUND: NMS and MC are life-threatening, neuropsychiatric syndromes, associated with considerable morbidity and mortality. NMS is diagnosed when there is a recent history of treatment with an antipsychotic (AP) medication, while MC is diagnosed when the symptoms resemble NMS but without a history of exposure to an AP agent. Some authorities believe that apart from the history of exposure to an AP medication, the two conditions are identical. The symptoms of NMS/MC include severe agitation, behavior disregulation, motor and speech changes, self-injury and aggression, autonomic instability, and a range of psychiatric symptoms (affective, anxiety, or psychotic symptoms). Patients may be misdiagnosed with another disorder leading to extensive tests and a delay in treatment. Untreated, the condition may be fatal in 10%-20% of patients, with death sometimes occurring within days of disease onset.

METHOD: We describe the presentation and management of five children and adolescents with NMS/MC.

CONCLUSION: MC and NMS are life-threatening medical emergencies, which if diagnosed promptly, can be successfully treated with known effective treatments (benzodiazepines and/or electroconvulsive therapy).