Abstract
A 72-year-old Japanese woman with a history of autoimmune hepatitis-associated liver cirrhosis and portosystemic shunt was admitted to our hospital for evaluation of renal dysfunction, nephrotic range proteinuria, a high titer of anti-double-stranded DNA antibody, and hypocomplementemia. Renal biopsy showed massive subendothelial deposits (wire loop lesions), and class IV-G (A/C) lupus nephritis was diagnosed. Immunosuppressants, such as steroids (including intravenous methylprednisolone pulse therapy) and mycophenolate mofetil, could not prevent renal dysfunction. It was assumed that circulating immune deposits produced in the gastrointestinal tract entered the systemic circulation from the portal vein via the portosystemic shunt without hepatic clearance, resulting in massive subendothelial and mesangial accumulation compared to lupus nephritis patients without a shunt and causing renal injury.
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