An Elderly Man with Fever and a Pustular Eruption: A Quiz

A 73-year-old man presented to our institution's department of dermatology with acute-onset fever and a generalized skin eruption.His medical comorbidities included hypercholesterolaemia treated with rosuvastatin 10 mg daily, hypertension treated with amlodipine 10 mg daily, polymyalgia rheumatica treated with prednisolone 3.75 mg daily and chronic plaque psoriasis for >15 years.Over the preceding year, his psoriasis had evolved from stable plaques into a more guttate morphology.A few days prior to the consultation, he developed a fever (maximum 38.7C) followed by rapid and widespread worsening of his psoriasis.On examination, he exhibited a diffuse erythematous and guttate eruption over the trunk and extremities, many of which were studded with