Central Nervous System Infections in Immunocompromised Patients

Area of Science:

• Neurology
• Infectious Diseases
• Immunology

Background:

• Immunocompromised patients, including those with cancer, undergoing transplantation, or with autoimmune conditions, face unique risks for central nervous system (CNS) infections.
• These infections can manifest differently than in immunocompetent individuals, necessitating specialized diagnostic approaches.

Purpose of the Study:

• To review current epidemiologic trends, clinical presentations, and diagnostic strategies for CNS infections in human immunodeficiency virus-negative (HIV) immunocompromised patients.
• To consider distinct patient groups: cancer patients, transplantation recipients, and those with autoimmune/inflammatory conditions on immunosuppressive therapies.

Main Methods:

• Review of current literature on CNS infections in specific immunocompromised patient populations.
• Analysis of differences in clinical presentations, neuroimaging, and cerebrospinal fluid (CSF) findings between immunocompromised and immunocompetent patients.

Main Results:

• Clinical presentations, neuroimaging, and CSF abnormalities in CNS infections vary significantly in immunocompromised versus immunocompetent individuals.
• Infections may precipitate neurotropic antibodies or inflammatory responses, particularly with cancer immunotherapies.
• Unbiased metagenomic assays are valuable for identifying rare pathogens in this growing patient population.

Conclusions:

• Awareness of specific clinical presentations and risks associated with underlying conditions and therapies is vital for prompt diagnosis and management of CNS infections in immunocompromised patients.
• Timely intervention is critical for improving outcomes in these potentially life-threatening infections and their mimics.