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Myositis-scleroderma overlap (50%-70% of patients with sensitivity). Less frequent in systemic sclerosis (10%) and myositis (20%). Rib-P Fine, dense granular to homogeneous cytoplasmic staining with perinuclear accentuation. 10-35% SLE patients. Up to 99% specificity Have been associated with neuropsychiatric symptoms. RNA pol III ................
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