Title : CNS crisis in a pediatric patient: navigating the inflammatory-vasculitic variant of pediatric Neuropsychiatric Systemic Lupus Erythematosus (NPSLE) and the role of biomarker-driven differentials
Abstract:
Background: Neuropsychiatric Systemic Lupus Erythematosus (NPSLE) in the pediatric population is characterized by a more aggressive clinical course and higher morbidity compared to adult-onset disease. Diagnostic clarity is often obscured by the mimicry of central nervous system (CNS) infections and primary demyelinating disorders, necessitating a biomarker-driven approach to management.
Case Presentation: A 16-year-old female with a known history of SLE presented with a sudden onset of malar rash, fever, and a rapid neurological decline culminating in acute loss of consciousness (LOC). Upon admission, she experienced an acute call due to vomiting and teeth grinding, with a drop in Glasgow Coma Scale (GCS) to 7, requiring immediate intubation and ICU transfer. Systemic rheumatological activity was prominent, including alopecia, palatal ulcers, and erythematous vasculitic rashes on the palms and digits.
Neuro-Immunological Evaluation:
Imaging: Cranial MRI with MRA revealed multifocal T2/FLAIR hyperintensities involving the bilateral corona radiata, basal ganglia, hippocampi, and posterolateral cerebellar hemispheres. A punctate diffusion restriction in the left hippocampus was highly suggestive of a neuroinflammatory or vasculitic process. CSF Dynamics: Lumbar puncture showed a significantly elevated CSF protein (109.60 mg/dL) but was acellular with normal glucose levels.
Differential Diagnosis: Given the multifocal lesions, Neuromyelitis Optica Spectrum Disorder (NMOSD) was a primary consideration. However, Serum Aquaporin-4 IgG was negative and oligoclonal bands were absent, effectively narrowing the diagnosis to the inflammatoryvasculitic variant of NPSLE.
Infection Control: Although the patient developed Hospital-Acquired Pneumonia (Klebsiella pneumoniae), direct CNS infection was ruled out via sterile CSF cultures.
Neuropsychiatric Outcomes: Following stabilization, neuropsychological testing via MOCA revealed a score of 22/30, indicating mild cognitive impairment. Screening for psychiatric comorbidities showed mild depression (PHQ-9: 5/9) and mild-moderate anxiety (GAD-7: 22).
Management and Clinical Course: The patient was treated with an aggressive immunosuppressive regimen consisting of Methylprednisolone pulse therapy (500mg IV for 3 days) and the initiation of Cyclophosphamide infusion (1g). For symptomatic neurological support, she received Levetiracetam for seizure prophylaxis and Escitalopram for mood stabilization. Her sensorium improved to a GCS of 15, and she was successfully discharged following the resolution of the acute crisis.
Discussion and Conclusion: This case underscores the critical nature of the inflammatoryvasculitic variant of NPSLE, where acute neurological symptoms can be the primary driver of life-threatening illness in pediatric patients. The successful navigation of this "acute CNS crisis" was dependent on utilizing specific neuro-immunological biomarkers to exclude NMOSD and CNS infections, allowing for the timely application of potent cytotoxic therapy. Early multi-disciplinary intervention remains the cornerstone for preventing permanent neuropsychiatric damage in children with severe SLE flares.
