Answer and Explanation 21

21.  A is the correct answer.  This clinical presentation is textbook for Kawasaki's Disease.  The major symptom is a fever greater than 5 days in this age group.  It usually does not respond to anti-pyretics.    It gives the deep red color to the mucus membranes and can have an associated conjunctivitis.  Fifth's disease would give you a rash on the cheeks like this but not have a fever for 8 days.  You also would not have that deep color red on the lips.  Eczema of course would not give you a fever or conjunctivitis.  Scarletina would not have a fever lasting for 8 days, and give you pink eye or deep red color to the lips.