Paediatricscommon
A 3-year-old boy presents with six days of fever above 39°C that has persisted despite regular paracetamol; he is miserable and difficult to console. Both eyes are red without discharge, his lips are dry, red and cracked, and his tongue is red with prominent papillae. There is a blanching red rash over the trunk with peeling of the skin in the nappy area, the backs of his hands and feet are puffy, and a single tender 2.5 cm lymph node is palpable on the left side of the neck. His immunisations are up to date. Which one of the following is the most likely diagnosis?