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Authors
Nobayashi, Hiroki
Haruhara, Kotaro
Nakamura, Tatsuya
Shiina, Yuki
Katsuma, Ai
Okabe, Masahiro
Suzuki, Kazuhito
Tsuboi, Nobuo
Yano, Shingo
Yokoo, Takashi
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Article History
Received: 3 September 2025
Accepted: 4 February 2026
First Online: 19 February 2026
Declarations
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: This case report was prepared as part of a study titled “Investigation of Treatment and Prognosis of Monoclonal Gammopathy of Renal Significance,” approved by the Ethics Committee of Jikei University School of Medicine (approval no: 36–148[12257]). The study was performed in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The requirement for informed consent from the patients was waived because of the retrospective nature of the study. Instead, all individual participants were provided the opportunity to opt out of this study.
: Written informed consent was obtained from the patient for the publication of this case report. In cases where written informed consent could not be obtained directly, the study details were explained, and the obtained consent was documented in the electronic medical record.
: The authors declare no competing interests.
