Yamaguchi criteria for diagnosis of adult-onset Still’s disease49
Fever ≥39°C for ≥1 week
Arthralgia for ≥2 weeks
Typical rash
Leucocytosis (>10×10⁹/L) with >80% granulocytes
Lymphadenopathy and/or splenomegaly
Hepatic dysfunction (elevated serum aminotransferases)
Sore throat
Negative rheumatoid factor and antinuclear antibodies