[Giant cell angiitis of the brain]

Area of Science:

• Neurology
• Pathology
• Immunology

Background:

• Giant cell angiitis (GCA) is a rare vasculitis affecting the central nervous system.
• Distinguishing GCA from other causes of vasculitis, such as temporal arteritis, is crucial for diagnosis and treatment.

Observation:

• A 25-year-old male presented with persistent severe headaches, progressing to acute neurological deterioration.
• Cerebrospinal fluid analysis showed lymphocytic pleocytosis and elevated protein.
• Corticosteroid therapy provided temporary improvement, but relapse occurred upon discontinuation.

Findings:

• Autopsy revealed ischemic necrosis and hemorrhage in the thalamus, basal ganglia, and internal capsule.
• Histopathology demonstrated granulomatous angiitis of cerebral arteries, capillaries, and veins with giant cells and microaneurysms.
• The inflammatory process involved various stages, suggesting progressive vessel involvement.

Implications:

• Giant cell angiitis of the brain is distinct from temporal arteritis in terms of age, location, and prognosis.
• Leptomeningeal biopsy is a recommended diagnostic procedure.
• The etiology of GCA may involve diverse pathogenic mechanisms, rather than a single nosological entity.