Table 1: Yamaguchi’s classification criteria.

Major criteria Minor criteria Exclusion criteria

(1) Fever >39°C intermittent for >1 week(1) Sore throat(1) Infections
(2) Malignancies
(3) Inflammatory diseases
(2) Arthralgia >2 weeks(2) Lymphadenopathy and or slenomegaly
(3) Typical rush(3) Abnormal liver function
(4) WBC > 10.000 (>80% granulocytes) (4) RF, ANA: (−)