Anamnesis

Identification: Female patient, 42 years old, previously healthy, presenting with a subacute progressive headache for 3 weeks.

Current Illness History:

Diffuse headache (7/10), constant, with paroxysmal exacerbations

Characteristics:

Worsens at night

Resistant to common analgesics

Associated with:

Fluctuating mental confusion

Progressive cognitive deficit (recent memory)

Episodes of transient diplopia

Constitutional symptoms:

Weight loss (4kg in 3 weeks)

Evening fever (37.8°C)

No history of:

Recent infections

Known autoimmune diseases

Illicit drug use

Neurological Examination:

Mental state:

Disorientation in time and space

Psychomotor slowing

Focal signs:

Mild right hemiparesis (4+/5)

Asymmetric reflexes (R>L)

NIHSS: 4 (mainly due to cognitive deficit)

Complementary Exams:

Brain MRI:

Multiple areas of T2/FLAIR hyperintensity (bilateral subcortical)

Post-contrast leptomeningeal enhancement

MR Angiography: Segmental stenoses in middle cerebral arteries

Lumbar puncture:

Clear CSF, normal opening pressure

Lymphocytic pleocytosis (25 cells/mm³)

Elevated proteins (80mg/dL)

Increased IgG, positive oligoclonal bands

Leptomeningeal biopsy (gold standard):

Transmural inflammatory infiltrate

Fibrinoid necrosis of small/medium vessels

Report this case — e.g. suspected re-identification risk.