Fulminant form of acute disseminated encephalomyelitis: successful treatment with hypothermia
Related Experiment Video
Updated: Oct 19, 2026

Short-Duration Hypothermia Induction in Rats using Models for Studies examining Clinical Relevance and Mechanisms
Published on: March 3, 2021
T Takata1, M Hirakawa, M Sakurai
1Department of Neurology, Graduate School of Medicine, University of Tokyo, Japan.
Abstract:
We described herein a case of the fulminant form of acute disseminated encephalomyelitis (ADEM) that developed after mycoplasma pneumonia. A 28-year-old man who presented with fever, headache, and writing difficulty was admitted to our hospital in August 1997. He developed hernia on the 3rd hospital day. Surgical decompression and intravenous prednisolone failed to halt his progressive deterioration. We introduced systemic hypothermia and he has shown marked recovery; despite having Broca's type aphasia, he could comprehend spoken language and communicate with others by gesture. Head MRI demonstrated diffuse high signals over the white matter on fluid attenuated inversion recovery (FLAIR) images, which suggested extensive demyelination. The clinical course, imaging studies and presence of polymorphonuclear dominant leucocytosis in the blood and CSF in the patient are somewhat similar to findings in acute hemorrhagic leukoencephalitis, however, the result of a brain biopsy was inconclusive. The fulminant form of ADEM is usually fatal. Treatments such as corticosteroids, intravenous immunoglobulin, and surgical decompression have been performed to improve the prognosis. Our case results indicate that hypothermia, which suppresses both brain edema and immune response, may be included in the repertoire of treatment for the fulminant form of ADEM.
Insights
Fulminant acute disseminated encephalomyelitis (ADEM) after mycoplasma pneumonia is often fatal. Systemic hypothermia showed marked recovery in a patient, suggesting its potential as a novel treatment for severe ADEM.
Area of Science:
- Neurology
- Infectious Diseases
- Critical Care Medicine
Background:
- Acute disseminated encephalomyelitis (ADEM) is a rare, immune-mediated inflammatory demyelinating disease of the central nervous system.
- Fulminant ADEM presents with rapid neurological deterioration and has a high mortality rate.
- Mycoplasma pneumonia is a known, albeit uncommon, trigger for ADEM.
Observation:
- A 28-year-old male presented with fever, headache, and aphasia following Mycoplasma pneumonia.
- Despite surgical decompression and corticosteroids, the patient experienced progressive neurological decline.
- Systemic hypothermia was initiated, leading to significant clinical improvement, including preserved language comprehension and communication via gestures.
Findings:
- Head MRI revealed extensive white matter demyelination consistent with ADEM.
- Cerebrospinal fluid analysis showed polymorphonuclear dominant pleocytosis, mimicking acute hemorrhagic leukoencephalitis.
- Brain biopsy results were inconclusive, highlighting diagnostic challenges in fulminant ADEM.
Implications:
- Systemic hypothermia may be a viable therapeutic option for fulminant ADEM, potentially mitigating brain edema and immune responses.
- This case expands treatment strategies beyond corticosteroids and intravenous immunoglobulin for severe ADEM.
- Further research is warranted to establish the efficacy and safety of hypothermia in managing fulminant ADEM.
Related Concept Videos
Methods of reducing fever
Pharmacological Methods of Reducing Fever:
Increased Body Temperature
Rocky Mountain Spotted Fever
Encephalitis ll: Pathophysiology
Encephalitis l: Introduction
Cryptococcal Meningitis
