[Butterfly rash: no lupus].

A 61-year-old male patient presented with petechiae on the arms and legs due to a thrombocytopenia of 3 Gpt/l (3000/microl). A butterfly rash on the patient's face suggested a diagnosis of systemic lupus erythematosus (SLE). The thrombocytopenia was due to autoimmune thrombocytopenia. The diagnosis of SLE could be excluded and the butterfly rash attributed to a laminar hemorrhage, an ecchymosis due to the autoimmune thrombocytopenia.