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Systemic amyloidosis in a patient with adult onset Still's disease.

A 39-year-old woman presented clinical features of adult onset Still's disease. Seven years after the onset, she developed renal insufficiency and biopsy studies revealed amyloid deposits involving amyloid A protein, P component, lambda chain and kappa chain in the kidney and rectum. She died in 1992, primarily due to cardiac failure associated with amyloidosis, indicating that amyloidosis should be considered one of the fatal complications in adult onset Still's disease with a long history.