Table 1: Clinical diagnosis criteria as determined by the American Heart Association and laboratory criteria that may be used to help establish the diagnosis.

American Heart Association diagnostic clinical criteria [2]Supplementary laboratory criteria [2, 34, 36, 41, 43]

Fever persisting >5 days, plus at least four out of five of the following principal features* 
(i) Changes in extremities, including indurative angioedema and desquamation
(ii) Polymorphous exanthema
(iii) Bilateral bulbar conjunctival injection without exudate
(iv) Changes to the lips and oral cavity, including pharyngeal injection, dry fissured lips, and/or strawberry tongue
(v) Acute nonpurulent cervical lymphadenopathy (>1.5 cm diameter)
(i) Albumin <3 g/dL
(ii) C-reactive protein >3 mg
(iii) Erythrocyte sedimentation rate >40 mm/h
(iv) Elevated alanine aminotransferase
(v) Leukocytosis: white cell count >15,000/mm
(vi) Normochromic, normocytic anaemia for age
(vii) Sterile pyuria: >10 white blood cell/mm3

If less than four of the principal features are present but two-dimensional echocardiography detects coronary artery abnormalities, patients are diagnosed with incomplete KD [2].