Volume 7, Issue 4 pp. 308-312
Case Report
Open Access

Hibernoma in the renal sinus: A case mimicking malignancy

Ayano Kashima

Ayano Kashima

Department of Urology, Aichi Medical University, Nagakute, Aichi, Japan

Contribution: Conceptualization, Writing - original draft, Writing - review & editing

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Tsuyoshi Majima

Corresponding Author

Tsuyoshi Majima

Department of Urology, Aichi Medical University, Nagakute, Aichi, Japan

Correspondence: Tsuyoshi Majima M.D., Ph.D., Department of Urology, Aichi Medical University, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195, Japan. Email: [email protected]

Contribution: Conceptualization, Supervision, Writing - original draft, Writing - review & editing

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Tomoaki Muramatsu

Tomoaki Muramatsu

Department of Urology, Aichi Medical University, Nagakute, Aichi, Japan

Contribution: Conceptualization, Writing - original draft, Writing - review & editing

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Haruka Kurosu

Haruka Kurosu

Department of Urology, Aichi Medical University, Nagakute, Aichi, Japan

Contribution: Conceptualization

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Hideji Kawanishi

Hideji Kawanishi

Department of Urology, Aichi Medical University, Nagakute, Aichi, Japan

Contribution: Conceptualization

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Ikuo Kobayashi

Ikuo Kobayashi

Department of Urology, Aichi Medical University, Nagakute, Aichi, Japan

Contribution: Conceptualization

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Keishi Kajikawa

Keishi Kajikawa

Department of Urology, Aichi Medical University, Nagakute, Aichi, Japan

Contribution: Conceptualization

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Taishi Takahara

Taishi Takahara

Department of Surgical Pathology, Aichi Medical University, Nagakute, Aichi, Japan

Contribution: Data curation

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Takahiro Yamamoto

Takahiro Yamamoto

Department of Radiology, Aichi Medical University, Nagakute, Aichi, Japan

Contribution: Data curation

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Naoto Sassa

Naoto Sassa

Department of Urology, Aichi Medical University, Nagakute, Aichi, Japan

Contribution: Supervision

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First published: 16 May 2024

Abstract

Introduction

Hibernomas are benign tumors of brown adipose tissue. Hibernoma in the renal sinus is extremely rare. Herein, we present the third known case of renal hibernoma.

Case presentation

A 71-year-old man reported to our department with a left kidney tumor with an average growth rate of 5 mm/year and a progressive contrast effect on computed tomography. It was diagnosed as a hibernoma following a laparoscopic radical nephrectomy.

Conclusion

We encountered a rare case of a hibernoma in the renal sinus. Development of new and accurate diagnostic methods for hibernoma, without resorting to nephrectomy, is essential.

Conflict of interest

The authors declare no conflicts of interest.

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