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Dilemmas in neuropsychiatric lupus
J A Kovacs1, M B Urowitz, D D Gladman
1University of Toronto Lupus Clinic, Ontario, Canada.
Rheumatic Diseases Clinics of North America
|November 1, 1993
Summary
Two-thirds of neuropsychiatric symptoms in systemic lupus erythematosus (SLE) stem from secondary causes, not direct central nervous system lupus. Differentiating these causes is challenging and impacts patient prognosis and mortality.
Area of Science:
- Rheumatology
- Neurology
- Internal Medicine
Background:
- Systemic lupus erythematosus (SLE) frequently presents with neuropsychiatric (NP) manifestations.
- A significant proportion of these NP manifestations are attributed to secondary causes rather than direct central nervous system (CNS) lupus.
- Distinguishing between primary CNS lupus and secondary causes of NP symptoms is clinically challenging.
Purpose of the Study:
- To highlight the prevalence of secondary causes for NP manifestations in SLE.
- To emphasize the diagnostic difficulties in differentiating primary CNS lupus from secondary causes.
- To underscore the prognostic implications of NP manifestations in SLE.
Main Methods:
- Review of existing literature on neuropsychiatric lupus (NPSLE).
- Analysis of the contribution of secondary factors (drugs, infections, metabolic/hypertensive complications) to NP symptoms in SLE patients.
- Clinical differentiation challenges between primary and secondary NP manifestations.
Main Results:
- An estimated two-thirds of NP manifestations in SLE are due to secondary causes.
- Secondary causes include medications, infections, and hypertensive/metabolic complications.
- Neuropsychiatric lupus (NPSLE) is associated with a poorer long-term prognosis.
Conclusions:
- The majority of NP symptoms in SLE patients arise from secondary factors.
- Accurate diagnosis is crucial as NPSLE is a predictor of poor outcomes.
- Despite treatment, NPSLE remains associated with increased mortality in SLE patients.