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Yoshimura K, Ito Y, Suzuki M, Horie M, Nishiuchi T, Shintani-Domoto Y, Shigehara K, Oshima H, Oshima M, Goto A, Nojima T, Tsuzuki T, Mizokami A, Ikeda H, Maeda D. Identification of uromodulin deposition in the stroma of perinephric fibromyxoid nephrogenic adenoma by mass spectrometry. Pathol Int 2024; 74:187-196. [PMID: 38289139 DOI: 10.1111/pin.13409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/09/2024] [Accepted: 01/13/2024] [Indexed: 02/03/2024]
Abstract
Nephrogenic adenoma (NA) is an epithelial lesion that usually occurs in the mucosa of the urinary tract. Rare cases of deep infiltrative or perinephric lesions have also been reported. Recently, NA with characteristic fibromyxoid stroma (fibromyxoid NA) has been proposed as a distinct variant. Although shedding of distal renal tubular cells due to urinary tract rupture has been postulated as the cause of NA in general, the mechanism underlying extraurinary presentation of NA and fibromyxoid stromal change in fibromyxoid NA remains unknown. In this study, we performed mass spectrometry (MS) analysis in a case of perinephric fibromyxoid NA of an 82-year-old man who underwent right nephroureterectomy for distal ureteral cancer. The patient had no prior history of urinary tract injury or radiation. Periodic acid-Schiff staining-positive eosinophilic structureless deposits in the stroma of fibromyxoid NA were microdissected and subjected to liquid chromatography/MS. The analysis revealed the presence of a substantial amount of uromodulin (Tamm-Horsfall protein). The presence of urinary content in the stroma of perinephric fibromyxoid NA suggests that urinary tract rupture and engraftment of renal tubular epithelial cells directly cause the lesion.
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Affiliation(s)
- Kaori Yoshimura
- Department of Pathology, Kanazawa University Hospital, Kanazawa, Japan
| | - Yukinobu Ito
- Department of Molecular and Cellular Pathology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Mina Suzuki
- Department of Molecular and Cellular Pathology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Masafumi Horie
- Department of Molecular and Cellular Pathology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Takumi Nishiuchi
- Division of Integrated Omics Research, Bioscience Core Facility, Research Canter for Experimental Modelling of Human Disease, Kanazawa University, Kanazawa, Japan
| | | | - Kazuyoshi Shigehara
- Department of Integrative Cancer Therapy and Urology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Hiroko Oshima
- Division of Genetics, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Masanobu Oshima
- Division of Genetics, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Akiteru Goto
- Department of Cellular and Organ Pathology, Graduate School of Medicine, Akita University, Akita, Japan
| | - Takayuki Nojima
- Department of Pathology, Kanazawa University Hospital, Kanazawa, Japan
| | - Toyonori Tsuzuki
- Department of Surgical Pathology, School of Medicine, Aichi Medical University, Nagoya, Japan
| | - Atsushi Mizokami
- Department of Integrative Cancer Therapy and Urology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Hiroko Ikeda
- Department of Pathology, Kanazawa University Hospital, Kanazawa, Japan
| | - Daichi Maeda
- Department of Molecular and Cellular Pathology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
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