Criteria for Diagnosis of Still’s Disease

Yamaguchi criteria for classification of adult Still’s disease

Presence of 5 or more criteria, of which at least 2 are Major (96% sensitivity; 92% specificity)

Yamaguchi criteria for classification of adult Still’s disease
Presence of 5 or more criteria, of which at least 2 are Major (96% sensitivity; 92% specificity)

Major Criteria

  • Temperature of >39°C for >1 wk
  • Leukocytosis >10,000/mm3 with >80% PMNs
  • Typical rash
  • Arthralgias >2 wk

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