Oral necrotizing microvasculitis in a patient affected by Kawasaki disease.

Kawasaki disease (KD) was first described in 1967 by Kawasaki, who defined it as "mucocutaneous lymph node syndrome". KD is an acute systemic vasculitis, which mainly involves medium calibre arteries; its origin is unknown, and it is observed in children under the age of 5, especially in their third year. The principal presentations of KD include fever, bilateral nonexudative conjunctivitis, erythema of the lips and oral mucosa, changes in the extremities, rash, and cervical lymphadenopathy.