Meningomalacia: Causes, Symptoms, Diagnosis & Treatment

Meningomalacia refers to pathological softening or degeneration of the meninges—the protective membranes surrounding the brain and spinal cord. This rare condition can result from various etiologies:

Causes

• Trauma: Head or spinal cord injury (e.g., traumatic brain injury, penetrating wounds).
• Infection: Severe meningitis, encephalitis, or abscess formation causing meningeal inflammation and damage.
• Immune-mediated disorders: Systemic lupus erythematosus, multiple sclerosis, or other autoimmune conditions attacking meningeal tissue.
• Radiation therapy: Delayed radiation injury to the meninges after treatment for CNS tumors.
• Congenital anomalies: Rare developmental defects of the meninges present at birth.

Symptoms

Manifestations depend on location and extent but may include:

• Persistent headaches
• Neck stiffness or pain
• Seizures
• Focal neurological deficits (weakness, numbness, speech difficulties)
• Signs of increased intracranial pressure

Diagnosis

• Neuroimaging: MRI (preferred) or CT scans to visualize meningeal thickening, enhancement, or signal changes.
• Lumbar puncture: CSF analysis for infection, inflammation, or malignant cells when indicated.
• Biopsy: Rarely needed for definitive diagnosis.

Treatment

Management targets the underlying cause:

• Infectious: Antimicrobials (antibiotics, antivirals, antifungals).
• Autoimmune: Corticosteroids, immunosuppressants, or biologics.
• Post-radiation: Corticosteroids, hyperbaric oxygen, or surgical decompression.
• Traumatic/structural: Surgical repair, decompression, or stabilization.

Prognosis & Monitoring

Outcomes vary widely. Early diagnosis and targeted therapy improve prognosis. Long-term monitoring for neurological deficits, hydrocephalus, or recurrence is essential.