Infections in myelodysplastic syndromes

Area of Science:

• Hematology
• Immunology
• Infectious Diseases

Background:

• Myelodysplastic syndromes (MDS) are linked to a significant risk of severe infections.
• Neutropenia is a primary cause, but other immune defects (neutrophil function, B-, T-, NK-cell) and iron overload also contribute.
• Patient age, comorbidities, and treatments like hypomethylating agents and lenalidomide exacerbate infection risk.

Purpose of the Study:

• To review the factors contributing to infection risk in MDS patients.
• To discuss current knowledge on infection types and the efficacy of prophylactic measures.
• To propose recommendations for managing infections in MDS.

Main Methods:

• Literature review and synthesis of existing data on infections in MDS.
• Analysis of predisposing factors, including hematological, immunological, and treatment-related aspects.
• Discussion of infection types (bacterial, fungal, viral) and prophylactic strategies.

Main Results:

• Bacterial infections are most common in MDS; fungal and viral infections are less frequent.
• No current prophylactic measures have demonstrated efficacy in MDS patients.
• MDS treatments can transiently worsen neutropenia, increasing infection severity.

Conclusions:

• Infections pose a major threat to MDS patients, influenced by multiple immune defects and patient factors.
• Evidence-based prophylactic strategies are lacking, highlighting the need for clinical trials.
• Recommendations for patient management are proposed pending further research into novel therapeutic approaches.