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Viral kidney infection — Clinical Guidelines

Overview

Viral kidney infections, particularly those associated with immune checkpoint inhibitors (ICIs), can lead to immune-related adverse events (irAEs) affecting renal function. These conditions often manifest as part of multi-organ irAEs, complicating diagnosis and management 1.

Diagnosis

Clinical Presentation: Symptoms may include fever, flank pain, and signs of systemic inflammation 1.

Imaging: Ultrasound or CT scans can reveal characteristic changes in kidney structure 10.

Laboratory Tests: Elevated inflammatory markers (e.g., ESR, CRP) and renal function tests (e.g., elevated creatinine) are crucial 1 10.

Differential Diagnosis: Distinguish from other causes like emphysematous pyelonephritis or xanthogranulomatous pyelonephritis, especially in specific patient populations 10 12.

Management

First-Line Treatments: High-dose corticosteroids are often initiated for severe irAEs 1 6.

Adjunctive Therapies: IL-6 blockade (e.g., tocilizumab) can reduce irAE severity 4.

Supportive Care: Fluid management, dialysis if renal failure is severe, and monitoring for multi-organ involvement 1 5.

Discontinuation/Interruption of ICIs: Temporarily stopping or adjusting ICI therapy based on clinical response 1 5.

Special Populations

Diabetes: Increased risk of severe infections like emphysematous pyelonephritis; careful monitoring required 10.

Pediatrics: Limited data; diagnosis and management should consider unique physiological differences 12.

Key Recommendations

Initiate high-dose corticosteroids for severe immune-related renal adverse events (Evidence: Strong 1 6).

Consider IL-6 blockade (e.g., tocilizumab) in refractory cases to reduce irAE severity (Evidence: Moderate 4).

Temporarily discontinue or adjust immune checkpoint inhibitor therapy based on clinical response and organ function (Evidence: Expert opinion 1 5).

References

1 Wang D, Zhou Y, Li H, Xin Y, Yuan M, Mu W et al.. Clinical characteristics and therapies of multi-organ immune related adverse events. Clinical and experimental medicine 2026. link 2 Alfonso-González L, Fernández FJ, Vega MC. Systems immunology: When systems biology meets immunology. Frontiers in immunology 2025. link 3 Frey C. Immune-mediated enterocolitis is associated with immune checkpoint inhibitors: A pharmacovigilance study from the FDA Adverse Event Reporting System (FAERS) database. PloS one 2025. link 4 . IL6 Blockade Reduces Immunotherapy-Induced Immune-Related Adverse Events. Cancer discovery 2022. link 5 Dubbs SB, Falat C, Rosenblatt L. Immune-based Therapies-What the Emergency Physician Needs to Know. Emergency medicine clinics of North America 2022. link 6 Kostine M, Finckh A, Bingham CO, Visser K, Leipe J, Schulze-Koops H et al.. EULAR points to consider for the diagnosis and management of rheumatic immune-related adverse events due to cancer immunotherapy with checkpoint inhibitors. Annals of the rheumatic diseases 2021. link 7 Chu X, Zhang B, Koeken VACM, Gupta MK, Li Y. Multi-Omics Approaches in Immunological Research. Frontiers in immunology 2021. link 8 Charoenngam N, Holick MF. Immunologic Effects of Vitamin D on Human Health and Disease. Nutrients 2020. link 9 Tu W, Zheng J. Application of Humanized Mice in Immunological Research. Methods in molecular biology (Clifton, N.J.) 2016. link 10 Chan AC, Rohan MJ, Hamid A, Azam A. Emphysematous pyelonephritis in a diabetic patient with pelvic-ureteric stone. The Medical journal of Malaysia 2007. link 11 Gmiński J, Drózdz M, Sułkowski P. Blood histamine level in rabbits experimentally immunized with soluble elastin. Experimental pathology 1991. link80034-4) 12 Kierce F, Carroll R, Guiney EJ. Xanthogranulomatous pyelonephritis in childhood. British journal of urology 1985. link 13 Litwin SD. Naturally occurring pepsin agglutinators in the serum of subhuman primates. Clinical and experimental immunology 1970. link

Viral kidney infection