Definition

Noun: A medical condition characterized by inflammation of the white matter of the brain. The white matter consists of nerve fibers (axons) and their protective myelin sheaths. Inflammation in this area disrupts the transmission of nerve signals.

Usage

The term is used in medical and neurological contexts to describe a specific pathological finding or diagnosis. * The MRI scan revealed signs consistent with leukoencephalitis. * Acute disseminated leukoencephalitis (ADEM) is a known post-infectious complication.

Advanced Usage

• The term is often part of more specific compound medical diagnoses, which describe the cause, pattern, or stage of the inflammation. These are distinct terms from the core word "leukoencephalitis" itself.
  • Acute hemorrhagic leukoencephalitis: A rare, severe, and often fatal form.
  • Progressive multifocal leukoencephalopathy (PML): A viral infection of the white matter.
  • These are specific disease entities where "leukoencephalitis" is a component of the name.

Variants and Related Words

• Leukoencephalopathy (noun): A broader term for any disease or disorder affecting the brain's white matter, which may or may not involve active inflammation. Leukoencephalitis is a specific type of leukoencephalopathy.
• Encephalitis (noun): General inflammation of the brain tissue.
• Myelitis (noun): Inflammation of the spinal cord.

Synonyms

• White matter encephalitis (descriptive synonym)
• Inflammatory leukoencephalopathy (descriptive synonym)

Notes on Meaning

• Core Meaning: The definition is precise and refers specifically to an inflammatory process. It is not a synonym for general brain disease or damage.
• Clinical Implication: A diagnosis of leukoencephalitis typically indicates an active disease process requiring medical investigation into its cause (e.g., autoimmune, infectious).

Noun

1. inflammation of the white matter of the brain