A 57-year-old woman with acute lymphoblastic leukemia (ALL) developed an antibiotics-resistant fever after remission induction therapy. Chest X-ray and computed tomography scan revealed multiple consolidations and cavities. Successively, numerous subcutaneous nodules and a thyroid mass emerged. Aspergillus flavus (A. flavus) was cultured from both sites. Despite the patient's granulocyte recovery, the fever persisted and multiorgan function deteriorated rapidly. However, she was successfully treated with intensive supportive therapy including continuous hemodialysis and filtration. Prolonged use of amphoterin B and itraconazole failed to cure her aspergillosis, but the illness remained indolent thereafter.