CNS vasculitis

Roger E Kelley1

  • 1Department of Neurology, LSU Health Sciences Center, 1501 Kings Highway, Shreveport, LA, USA.

Insights

Central nervous system (CNS) vasculitis involves inflammation of brain blood vessels, often immune-mediated. Early recognition and understanding its pathogenesis, including genetic factors, are crucial for effective treatment and preventing severe outcomes.

Area of Science:

  • Neurology
  • Immunology
  • Pathology

Background:

  • Central nervous system (CNS) vasculitis encompasses diverse disorders affecting CNS blood vessels.
  • It can be primary or secondary to systemic conditions like systemic lupus erythematosus (SLE) or polyarteritis nodosa (PAN).
  • Inflammation may be immune-mediated or infectious, with hypersensitivity states and genetic predisposition as potential triggers.

Purpose of the Study:

  • To highlight the importance of recognizing CNS vasculitis.
  • To discuss the evolving understanding of its pathogenesis.
  • To emphasize the need for timely diagnosis and treatment.

Main Methods:

  • Review of existing literature on CNS vasculitis.
  • Discussion of immune-mediated pathways.
  • Exploration of genetic susceptibility factors.

Main Results:

  • CNS vasculitis presents with neurological deficits in a vascular distribution.
  • Most vasculitides are cell-mediated, with CD4+ T-cell activation implicated in giant cell arteritis.
  • Genetic factors contribute to the cascade of vascular injury.

Conclusions:

  • Understanding the pathogenesis of CNS vasculitis is key to its recognition and management.
  • Cell-mediated immunity and genetic predisposition play significant roles.
  • Prompt diagnosis and treatment are essential to avert devastating consequences.

Related Concept Videos

Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
Vascular Spasm01:16

Vascular Spasm

The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last for...
Arboviral Encephalitis01:25

Arboviral Encephalitis

Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...
Encephalitis l: Introduction01:19

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
Viral Meningitis01:18

Viral Meningitis

Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...