© 1995 British Society for Rheumatology
case-report |
CEREBRAL VENOUS THROMBOSIS AND ACQUIRED PROTEIN S DEFICIENCY: AN UNCOMMON CAUSE OF HEADACHE IN SYSTEMIC LUPUS ERYTHEMATOSUS

Department of Rheumatology, St George's Hospital London SW170QT
*Division of Clinical Neurosciences, St George's Hospital Medical School London SW 17 ORE
Department of Neuroradiology, Atkinson Morley 's Hospital London SW20 0NG
Correspondence to:
Correspondec to: C. J. Laversuch, Department of Rheumatology, St George's Hospital, London SW 17 OQT.
A 42-yr-old woman with hypertension and renal involvement due to systemic lupus erythematosus (SLE) developed unilateral headache followed by the sudden onset of confusion and a grand mal convulsion. Cerebral computed tomography was normal. A magnetic resonance imaging angiogram revealed cerebral venous thrombosis and a venous infarct. Nephrotic syndrome had resulted in an acquired protein S deficiency. A review of previous cases suggests that either renal disease with proteinuria or features of the antiphospholipid syndrome are prerequisites for the development of cerebral venous thrombosis in SLE. Low free-protein S levels may be an additional risk factor. Furthermore it is likely that this condition is underdiagnosed.
KEY WORDS: Cerebral venous thrombosis, Systemic lupus erythematosus, Protein S, Magnetic resonance imaging, Nephrotic syndrome
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