A 8-year-old Caucasian boy with history of acute lymphoblastic leukemia comes to the Emergency Department because of a painful rash. His temperature is 36.7°C (98.1°F), pulse is 105/min, respirations are 22/min, and blood pressure is 108/70 mmHg. Physical examination shows a painful, blistering rash that spans most of his left arm. Which of the following is the most likely diagnosis?
- Atopic dermatitis
- Herpes zoster
- Staphylococcal scalded skin syndrome