Chronic meningitis

Chronic Meningitis
Meningitis.png
Synonyms	N/A
Pronounce	N/A
Specialty	N/A
Symptoms	Headache, fever, neck stiffness, altered mental status
Complications	Hydrocephalus, cranial nerve palsies
Onset	Gradual
Duration	Weeks to months
Types	N/A
Causes	Infectious (e.g., tuberculosis, fungal infections), non-infectious (e.g., sarcoidosis, neoplastic meningitis)
Risks	N/A
Diagnosis	Lumbar puncture, CSF analysis, MRI
Differential diagnosis	N/A
Prevention	N/A
Treatment	Depends on underlying cause
Medication	N/A
Prognosis	Variable
Frequency	N/A
Deaths	N/A

Chronic meningitis is a medical condition characterized by the prolonged inflammation of the meninges, the protective membranes covering the brain and spinal cord. Unlike acute meningitis, which develops rapidly, chronic meningitis progresses over weeks to months and can be caused by a variety of infectious and non-infectious agents.

Etiology

Chronic meningitis can be caused by several different factors:

Infectious Causes

• Tuberculosis: Mycobacterium tuberculosis is a common cause of chronic meningitis, especially in regions where tuberculosis is endemic.
• Fungal Infections: Organisms such as Cryptococcus neoformans, Histoplasma capsulatum, and Coccidioides immitis can lead to chronic meningitis, particularly in immunocompromised individuals.
• Spirochetes: Syphilis (caused by Treponema pallidum) and Lyme disease (caused by Borrelia burgdorferi) can result in chronic meningitis.

Non-Infectious Causes

• Sarcoidosis: This inflammatory disease can affect the central nervous system, leading to chronic meningitis.
• Neoplastic Meningitis: Cancerous cells from primary or metastatic tumors can invade the meninges, causing chronic inflammation.
• Autoimmune Disorders: Conditions such as lupus and Behçet's disease can cause chronic meningitis.

Clinical Presentation

Patients with chronic meningitis typically present with a combination of the following symptoms:

• Persistent headache
• Low-grade fever
• Neck stiffness
• Altered mental status
• Cranial nerve palsies
• Sensory or motor deficits

Diagnosis

The diagnosis of chronic meningitis involves a combination of clinical evaluation and laboratory testing:

• Lumbar puncture: Analysis of cerebrospinal fluid (CSF) is crucial. Findings may include elevated protein, low glucose, and lymphocytic pleocytosis.
• MRI: Imaging can reveal meningeal enhancement and other abnormalities.
• Serological Tests: Specific tests for infectious agents such as HIV, syphilis, and fungal antigens may be performed.
• Biopsy: In some cases, a meningeal biopsy may be necessary to identify the underlying cause.

Treatment

Treatment of chronic meningitis depends on the underlying cause:

• Antimicrobial Therapy: For infectious causes, appropriate antibiotics, antifungals, or antivirals are administered.
• Corticosteroids: These may be used to reduce inflammation, particularly in non-infectious causes.
• Immunosuppressive Therapy: For autoimmune causes, medications such as methotrexate or azathioprine may be used.

Prognosis

The prognosis of chronic meningitis varies widely depending on the etiology and the timeliness of diagnosis and treatment. Infectious causes generally have a better prognosis if treated early, while neoplastic meningitis often has a poor outcome.

Also see

• Acute meningitis
• Tuberculous meningitis
• Cryptococcal meningitis
• Neurosarcoidosis
• Neoplastic meningitis

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External links

• Comprehensive information from the National Institute of health.
  

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