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Acute hemorrhagic leukoencephalitis(AHL) is a veryrareform of acute disseminated encephalomyelitis that usuallyresults indeath. It is characterized by a brief but intense attack of inflammation in the brain and spinal cord that damages the myelin -- the protective covering of the nerve fibers. It may also cause bleeding in the brain, leading to damage of the white matter. Symptoms usually come on quickly, beginning with symptoms such as fever, neck stiffness, fatigue, headache, nausea vomiting,seizures, and coma.AHL has a very poor prognosis, with rapid deterioration and death usually occurring within days to one week after onset of symptoms because of severe inflammation in the brain. Although the exact cause is unclear,AHL usually followsaviral infection, or less often, vaccination for measles, mumps, or rubella. Some researchers think that an infection or vaccination can initiate an autoimmune process in the body thus leading to AHL.
Biomarker and diagnostic research for acute hemorrhagic leukoencephalitis has been reported in the published literature.
No clinical trials have been registered for acute hemorrhagic leukoencephalitis.
59 publications have been identified in PubMed for acute hemorrhagic leukoencephalitis. Research spans Case Report / Case Series (73%), Basic Science / Preclinical (10%), and Review / Meta-Analysis (7%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 43 | 73% |
Data assembled from 3 of 12 sources · Last updated Sep 20, 2026, 6:50 AM UTC
Online Mendelian Inheritance in Man
Genetic and Rare Diseases Info Center
Common questions about acute hemorrhagic leukoencephalitis
Laboratory research
6 |
10% |
Research summaries | 4 | 7% |
Disease patterns and progression | 4 | 7% |
Testing and diagnosis research | 1 | 2% |
New treatment approaches | 1 | 2% |
Joffe AR (2026). [PMID: 41780222](https://pubmed.ncbi.nlm.nih.gov/41780222/). *Pediatr Neurol*. [Review / Meta-Analysis]
Yan J (2026). [PMID: 41630000](https://pubmed.ncbi.nlm.nih.gov/41630000/). *Journal of medical case reports*. [Epidemiology / Natural History]
Desgraupes S (2026). [PMID: 41651846](https://pubmed.ncbi.nlm.nih.gov/41651846/). *Nature communications*. [Case Report / Case Series]
Almeer FS (2026). [PMID: 41678422](https://pubmed.ncbi.nlm.nih.gov/41678422/). *The American journal of case reports*. [Case Report / Case Series]
Fernandes L (2026). [PMID: 41082198](https://pubmed.ncbi.nlm.nih.gov/41082198/). *JAMA neurology*. [Case Report / Case Series]
S A (2026). [PMID: 42114927](https://pubmed.ncbi.nlm.nih.gov/42114927/). *BMJ Case Rep*. [Case Report / Case Series]
Mirg S (2025). [PMID: 41061185](https://pubmed.ncbi.nlm.nih.gov/41061185/). *Neurology(R) neuroimmunology & neuroinflammation*. [Case Report / Case Series]
Easow B (2025). [PMID: 40951117](https://pubmed.ncbi.nlm.nih.gov/40951117/). *Cureus*. [Case Report / Case Series]
Yamaguchi Y (2025). [PMID: 39231656](https://pubmed.ncbi.nlm.nih.gov/39231656/). *Internal medicine (Tokyo, Japan)*. [Case Report / Case Series]
Tuli A (2025). [PMID: 41280370](https://pubmed.ncbi.nlm.nih.gov/41280370/). *The Neurohospitalist*. [Case Report / Case Series]
AI-curated news mentioning acute hemorrhagic leukoencephalitis
Updated Feb 12, 2026
A case study published in PubMed highlights acute hemorrhagic necrotizing encephalopathy in a COVID-19 patient who responded positively to intravenous immunoglobulin therapy. This research adds to the understanding of neurological complications associated with COVID-19.