Abstract
Drug-induced hypersensitivity syndrome or drug reaction with eosinophilia and systemic symptoms (DRESS) is a severe drug-induced reaction that represents a life-threatening condition. The histopathologic appearance of the skin biopsy is nonspecific but may exceptionally show an atypical intralymphatic lymphocytic infiltrate, and mimic an intravascular lymphoma. Through this article, we will report an exceptional case of a patient presenting with skin lesions pointing to a dress, but whose histological appearance, in the presence of adenopathy during physical examination, can lead, by mistake, to the diagnosis of an intralymphatic lymphoma. We aim to highlight the various diagnostic indices allowing the distinction between these two entities, including the immunohistochemical study, the search for the TcR clonal rearrangement and the anatomo-clinical correlation.
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