What question did this study set out to answer?

To identify and characterize the rare case of CD8+ cell infiltration in drug-induced tubulointerstitial nephritis (TIN).

March 28, 2026Open Access

WCN26-1548 Predominant CD8+ cell infiltration and low accumulation of regulatory T cells in immune checkpoint inhibitor-induced tubulointerstitial nephritis

KTKenta TominagaSelf-Defense Forces Central Hospital ETEtsuko TodaNippon Medical School KTKazuhiro TakeuchiNational Hospital Organization

Key Points

To identify and characterize the rare case of CD8+ cell infiltration in drug-induced tubulointerstitial nephritis (TIN).
Case analysis of drug exposure and immune response
Assessment of immune cell infiltration
Serological evaluation for autoantibodies
Predominant CD8+ T cell infiltration observed
Low levels of regulatory T cell accumulation noted
Absence of specific autoantibodies and immune deposits confirmed
Similarities to lupus serologically but lacking definitive diagnosis

Abstract

Conclusion:This case highlights a rare but increasingly recognized entity of drug-induced eosinophilic TIN with isolated ANA positivity, mimicking lupus serologically but lacking diagnostic criteria.The absence of specific autoantibodies and immune deposits, combined with toxic exposure history, supports a drug-induced mechanism.Recognizing this diagnostic pattern is crucial to differentiate druginduced injury from primary autoimmune disease and avoid misdiagnosis or overtreatment.I have no potential conflict of interest to disclose.I did not use generative AI and AI-assisted technologies in the writing process.

AI에게 질문

Bookmark

View Full Paper