Persistent Eosinophilia After DRESS Syndrome

1. Abstract

Drug reaction with eosinophilia and systemic symptoms (DRESS) is a rare, potentially life-threatening hypersensitivity reaction that may occur during treatment with various drugs. This report describes the case of a 57-year-old woman whose DRESS syndrome was successfully treated in our department. Because of the persistence of eosinophilia, we set up a diagnostic pathway to better frame it. As a result, we detected an unknown clear cell renal cancer which was then operated and led to the complete resolution of the eosinophilia.