The study was conducted as a prospective multicenter trial to evaluate the efficacy and safety of micafungin in patients with invasive fungal infections (IFIs) in hematological disorders. A total of 277 patients was registered, and 197 were assessed for clinical efficacy. The mean dosage and duration of micafungin were 170.7 mg/day and 22.0 days, respectively. The efficacy rates were 87.5% (7/8) for patients with candidiasis, 44.7% (17/38) for probable IFIs, 61.9% (39/63) for possible IFIs and 80.7% (71/88) for those who failed to respond to antibacterials. In patients with febrile neutropenia (below 500 μL), despite broad-spectrum antibacterial treatment over 2 days, 86.3% (44/ 51) of patients had a favourable response to micafungin. The incidence of adverse events related to micafungin was 14.1% (39/277), but most of them were mild and reversible. These data indicate the usefulness of micafungin as a novel therapeutic drug for both empirical and targeted therapy for IFIs.
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