{"title":"[A Case of Renal Myopericytoma].","authors":"Maki Nakamura, Yukiyoshi Hirayama, Ryo Katsube, Kaoru Kimura, Akinori Minami, Syunji Nishide, Tomohiro Hasaka, Chikako Nishihara, Toshihiro Asai, Keiichi Ishii, Sadanori Kamikawa","doi":"10.14989/ActaUrolJap_71_9_295","DOIUrl":null,"url":null,"abstract":"<p><p>A 62-year-old female was referred to our hospital for further evaluation of a right renal mass. Contrastenhanced computed tomography (CT) revealed a 36 mm solid mass in the middle portion of the right kidney with early enhancement and washout, leading to a preoperative diagnosis of right renal cell carcinoma (cT1aN0M0, stage I). The patient underwent robot-assisted partial nephrectomy (RAPN). Histopathological examination showed spindle-cell proliferation arranged concentrically around the blood vessels, and immunohistochemical staining was positive for calponin and α-SMA, confirming the diagnosis of myopericytoma. No recurrence or metastasis was observed during the six months of follow-up.</p>","PeriodicalId":39291,"journal":{"name":"Acta Urologica Japonica","volume":"71 9","pages":"295-299"},"PeriodicalIF":0.0000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Urologica Japonica","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14989/ActaUrolJap_71_9_295","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Medicine","Score":null,"Total":0}
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Abstract
A 62-year-old female was referred to our hospital for further evaluation of a right renal mass. Contrastenhanced computed tomography (CT) revealed a 36 mm solid mass in the middle portion of the right kidney with early enhancement and washout, leading to a preoperative diagnosis of right renal cell carcinoma (cT1aN0M0, stage I). The patient underwent robot-assisted partial nephrectomy (RAPN). Histopathological examination showed spindle-cell proliferation arranged concentrically around the blood vessels, and immunohistochemical staining was positive for calponin and α-SMA, confirming the diagnosis of myopericytoma. No recurrence or metastasis was observed during the six months of follow-up.
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