When mice with experimental daunorubicin extravasation were treated with dexrazoxane systemically combined with topical treatment with DMSO on the daunorubicin-affected skin area, 67% of the mice developed small skin wounds, whereas dexrazoxane treatment alone completely prevented the daunorubicin induced skin necrosis in another group of mice, Thus, DMSO should not be used in patients treated with dexrazoxane to prevent anthracycline extravasation.