Medical Definition of Adult-onset Still disease
Adult-onset Still disease: Although Still disease was first described in children, it is known to begin in adults (rarely). Of all patients with Still disease, 100% have high intermittent fever; 100% have joint inflammation and pain, muscle pain with fevers, and develop persistent chronic arthritis. Ninety-five percent (95%) have the faint salmon-colored skin rash. Eighty-five percent (85%) have swelling of the lymph glands or enlargement of the spleen and liver; and 85% have a marked increase in the white blood cell count. Sixty percent (60%) have inflammation of the lungs (pleuritis) or around the heart (pericarditis). Forty percent (40%) have severe anemia. And twenty percent (20%) have abdominal pain.
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