3) A 47-year-old man presented to the emergency department with a 3-day history of a pustular rash on both hands. One week before the presentation, he had started treatment with penicillin V potassium for pharyngitis. Physical examination demonstrated a rash shown below; a similar rash is present on the soles of both of his feet. A punch-biopsy specimen of a palmar lesion was obtained, and histopathological analysis revealed subcorneal pustules and a mononuclear-cell infiltrate in the dermis. What is the diagnosis? *
