<prompt> What is the most likely diagnosis in this woman who developed eosinophilia and a diffuse erythematous eruption while being treated with hydroxychloroquine for Sjogrens syndrome?Bullous impetigoExanthematous pustulosisExfoliative dermatitisStevens-Johnson syndrome  <response>: Answer B. Exanthematous pustulosisYellow hyperplastic papules on the tongue of a hydroxychloroquine-treated patient with a diffuse erythematous eruption is most consistent with a diagnosis of hydroxychloroquine-induced acute generalized exanthematous pustulosis. The lesions resolved following withdrawal of the medication and treatment with prednisolone. 