A CASE OF SEVERE COVID-19 LEADING TO END-STAGE RENAL FAILURE DUE TO FUNGAL GRANULOMATOUS INTERSTITIAL NEPHRITIS.

 

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A CASE OF SEVERE COVID-19 LEADING TO END-STAGE RENAL FAILURE DUE TO FUNGAL GRANULOMATOUS INTERSTITIAL NEPHRITIS.

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Kenta
Taito
Kenta Taito taitokenta2000@yahoo.co.jp Tokyo Metropolitan Institute for Geriatrics and Gerontology Nephrology and Dialysis Tokyo Japan *
Masatoshi Oka masatoshi_oka@tmghig.jp Tokyo Metropolitan Institute for Geriatrics and Gerontology Nephrology and Dialysis Tokyo Japan -
Kaoruko Fukushima kaoruko_fukushima@tmghig.jp Tokyo Metropolitan Institute for Geriatrics and Gerontology Nephrology and Dialysis Tokyo Japan -
Kanako Yatabe kanako_yatabe@tmghig.jp Tokyo Metropolitan Institute for Geriatrics and Gerontology Nephrology and Dialysis Tokyo Japan -
Ayano Izawa ayano_izawa@tmghig.jp Tokyo Metropolitan Institute for Geriatrics and Gerontology Nephrology and Dialysis Tokyo Japan -
Yui Ota yui_ota@tmghig.jp Tokyo Metropolitan Institute for Geriatrics and Gerontology Nephrology and Dialysis Tokyo Japan -
Shiho Matsuno shiho_matsuno@tmghig.jp Tokyo Metropolitan Institute for Geriatrics and Gerontology Nephrology and Dialysis Tokyo Japan -
Noriyuki Suzuki noriyuki_suzuki@tmghig.jp Tokyo Metropolitan Institute for Geriatrics and Gerontology Nephrology and Dialysis Tokyo Japan -
Mitsuyo Itabashi mitsuyo_itabashi@tmghig.jp Tokyo Metropolitan Institute for Geriatrics and Gerontology Nephrology and Dialysis Tokyo Japan -
Takashi Takei takashi_takei@tmghig.jp Tokyo Metropolitan Institute for Geriatrics and Gerontology Nephrology and Dialysis Tokyo Japan -
 
 
 
 
 

Candidemia is a significant disease with a high mortality rate. While Candida primarily proliferates in the kidneys, making them the most frequently involved organ, diagnosis is challenging, resulting in rare reports of fungal granulomatous interstitial nephritis. We report a case of fungal granulomatous interstitial nephritis caused by Candida that developed during immunosuppressive therapy for COVID-19.

[Case] 61-year-old male.

[Medical History]

He was under outpatient care at a local hospital for diabetes and dyslipidemia. He contracted COVID-19 6 days prior to admission (X-6 days). On day X, his SpO2 decreased, and he was admitted to our hospital. He developed severe COVID-19, requiring mechanical ventilation and extracorporeal membrane oxygenation, from which he was weaned. However, on day X+32, his pneumonia worsened again, necessitating reinitiation of mechanical ventilation and steroid therapy. On day X+57, he developed candidemia. Although blood cultures became negative with antifungal therapy, β-D-glucan levels remained persistently elevated. On day X+103, he developed AKI, progressing to end-stage renal failure on day X+105, necessitating hemodialysis initiation. He died on day X+162 due to gastrointestinal hemorrhage. Autopsy revealed granulomatous interstitial nephritis caused by Candida.

This case presented multiple risk factors for invasive candidiasis: ICU admission, central venous catheter use, immunosuppressive therapy, and COVID-19 (recent studies suggest COVID-19 may impair the immune response against Candida). Although standard treatment for invasive candidiasis—antifungal therapy for 2 weeks after blood cultures became negative—was administered, the nephritis persisted. Diagnosing fungal granulomatous interstitial nephritis requires a renal biopsy, which is often difficult in patients with poor systemic condition. Development of simpler diagnostic methods is anticipated, and extending treatment duration to account for potential nephritis complications should be considered in susceptible hosts.

Kewords