Invasive Fungal Infections Among Patients with Hematological Malignancies: A Two-Year Multicentric Study from Tehran, Iran

Background: Invasive fungal infection (IFI) is a life-threatening condition, particularly in individuals with compromised immune systems. Objectives: Our study aims to evaluate IFI in hospitalized patients with hematological malignancies. Methods: In this retrospective cross-sectional study, we evaluated patients with hematological malignancies admitted to two university hospitals in Tehran, Iran, from 2020 to 2021 for IFI. We selected only those patients who had been hospitalized for at least four days for antimicrobial treatment. Data analysis was conducted using SPSS-26 software, employing Mann-Whitney U, chi-square, and Fisher exact tests. Results: During the study period, 60 out of 213 patients with hematological malignancies were admitted for antimicrobial treatment. The average age of the patients was 57.1 years, with fever being the most common symptom, reported in 63.3% of cases. We identified 24 cases of IFI, including three proven cases (Candida spp.) and 21 probable cases. Statistical analysis showed a lower mean neutrophil count in the IFI group compared to the non-IFI group (3862 versus 12881, P = 0.001) and a higher mortality rate (58.3% versus 27.8%, P = 0.031). Conclusions: Our study revealed that severe neutropenia is a significant risk factor for IFI, and the mortality rate associated with IFI remains high despite advances in the treatment of hematological malignancies.