Is Asian type MS an MS phenotype, an NMO spectrum disorder, or a MOG-IgG related disease?

Background: A specific particularity of neurological diseases in Asia is the relative commonality of neuromyelitis optica (NMO) and Asian type MS (OSMS). Both conditions also occur in South American patients. The Brazilian population differs from the European and the Asian populations due to the mixture of ancestralities between European colonizers and African slaves.

Case Report: Acute Transverse Myelitis after Zika Virus Infection.

We report here one case of Zika virus (ZIKV) infection associated with auto-immunity directed against the central nervous system in a Brazilian woman who developed acute transverse myelitis 9 days after recovery from an acute episode of fever with generalized erythema. Imaging of the spinal cord showed an elongated area on the T1-T10 level with gadolinium uptake. The diagnostic of the ZIKV infection was confirmed by cerebrospinal fluid and serum analysis.

Lower frequency of antibodies to MOG in Brazilian patients with demyelinating diseases: An ethnicity influence?

Objective: Antibodies against Myelin Oligodendrocyte glycoprotein (MOG-Ab) have been investigated as potential biological marker for neuromyelitis optica (NMO) and high-risk syndromes (HR) negative for AQP4-Ab in populations with different ethnic background. We tested AQP4 and MOG antibodies in a Brazilian population with high African ethnic background.

Method: The study population was composed of adult patients from Rio de Janeiro with inflammatory demyelinating diseases (new and old cases).

Central Nervous System Idiopathic Inflammatory Demyelinating Disorders in South Americans: A Descriptive, Multicenter, Cross-Sectional Study.

The idiopathic inflammatory demyelinating disease (IIDD) spectrum has been investigated among different populations, and the results have indicated a low relative frequency of neuromyelitis optica (NMO) among multiple sclerosis (MS) cases in whites (1.2%-1.5%), increasing in Mestizos (8%) and Africans (15.

Acute encephalopathy with bilateral thalamotegmental involvement and a benign course: a case report from Brazil.

This rare encephalopathy that generally affects children is preceded by a respiratory infection and fever associated with convulsions and may progress to coma. Outcome is catastrophic in most cases. This case report describes a Brazilian child of African descent with fever, cephalea and bilateral amaurosis, who evolved to coma with pyramidal signs and associated convulsions.