[A rare medical chameleon with fatal consequences].

The following case describes the relapsing and ultimately fatal outcome of DRESS (drug reaction with eosinophilia and systemic symptoms) syndrome as an often misdiagnosed drug-induced hypersensitivity reaction. The disease was complicated by progressive worsening with involvement of multiple organs and profound agranulocytosis. The main goal of this article is to raise awareness of the syndrome and its potential severity. Moreover, it outlines a number of pitfalls that may face the clinician.