Managing Invasive Fungal Infections During Allogeneic Hematopoietic Transplantation: A 2025 Update.

Invasive fungal infections (IFIs) mostly affect immunocompromised hosts and are responsible for high rates of complications and mortality. Prevalence of IFIs has been reported between 7 and 15% and is evolving due to the introduction of new drugs in the prophylaxis of high-risk patients. Invasive candidiasis has become less frequent, while cases of aspergillosis are increasing. The most important risk factors for IFIs can be divided into 3 categories: those related to the hematological neoplasm, those related to the patient's lifestyle, and those dictated by the transplant characteristics. In high-risk patients, prophylaxis is driven by both local epidemiology and the timing of engraftment. During the pre-engraftment period, a wide spectrum of drugs can be chosen as antifungals, while in the post-engraftment period, posaconazole is recommended for patients presenting with GvHD who are undergoing immunosuppression. Regarding treatment, voriconazole is still the recommended drug for invasive aspergillosis, although adverse events, toxicity, and drug interactions are particularly relevant. In the management of IFIs, international guidelines recommend the best drugs for prophylaxis and treatment, but the future holds new molecules that are already demonstrating excellent efficacy and tolerability.