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Differential Diagnosis of Antinuclear Antibody (ANA) Positive
• Systemic lupus erythematosus (SLE) (more significant if titer >1 : 160)
• Sjögren’s syndrome
• Scleroderma
• Rheumatoid arthritis (RA)
• Necrotizing vasculitis
• Mixed connective tissue disease
• Drugs (e.g., phenytoin, ethosuximide, primidone, methyldopa, hydralazine, carbamazepine, penicillin, procainamide, chlorpromazine, griseofulvin, thiazides)
• Autoimmune hepatitis
• Age older than 60 years (particularly age older than 80 years)
• Systemic lupus erythematosus (SLE) (more significant if titer >1 : 160)
• Sjögren’s syndrome
• Scleroderma
• Rheumatoid arthritis (RA)
• Necrotizing vasculitis
• Mixed connective tissue disease
• Drugs (e.g., phenytoin, ethosuximide, primidone, methyldopa, hydralazine, carbamazepine, penicillin, procainamide, chlorpromazine, griseofulvin, thiazides)
• Autoimmune hepatitis
• Age older than 60 years (particularly age older than 80 years)
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