Kawasaki Disease

Medium sized artery vasculitis in children under five years old.
Unknown aetiology but possibly infection.
Higher risk in Asians, especially Japenese and Koreans.

Signs

#fcem #FOAMed #paediatrics Features of Kawasaki disease. pic.twitter.com/cZkF241IaA

— #hellomynameisDrKirsty (@KirstyChallen) April 21, 2015

or

Symptoms of Kawasaki Disease can be remembered by the mnemonic "CREAM" - http://t.co/4EKqYRMqbP #USMLE #FOAMed pic.twitter.com/zBmzrAXc12

— knowmedge (@knowmedge) January 27, 2014

In the absense of inflammation (high WCC or CRP) Kawasaki is unlikely.
Don't wait for fever >5 days to diagnose it though - it might be incomplete.

https://www.rcemlearning.co.uk/foamed/a-child-with-a-fever/
https://adc.bmj.com/content/99/1/74
https://www.paediatricfoam.com/2017/06/kawasaki-disease-pearls-and-pitfalls/?subscribe=success#blog_subscription-4
http://dontforgetthebubbles.com/kawasaki-disease-beware-the-incomplete/
http://rolobotrambles.com/notjustafever/
https://calgaryguide.ucalgary.ca/wp-content/uploads/image.php?img=2017/05/Kawasaki-Disease.jpg