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An Xp11.2 translocation renal cell carcinoma with SMARCB1 (INI1) inactivation in adult end-stage renal disease: a case report

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单位: [1]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Inst Pathol,Wuhan 430030,Peoples R China [2]Huazhong Univ Sci & Technol, Sch Basic Med Sci, Dept Pathol, Wuhan 430030, Peoples R China
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关键词: Renal cell carcinoma Kidney TFE3 Xp11 2 SMARCB1

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Background: Xp11.2 translocation/transcription factor E3 (TFE3) rearrangement renal cell carcinoma (RCC) is a rare subtype of RCC with limited clinical and pathological data. Case presentation: Here we present an unusual high-grade Xp11.2 translocation RCC with a rhabdoid feature and SMARCB1 (INI1) inactivation in a 40-year-old man with end-stage kidney disease. The histological examination of the dissected left renal tumor showed an organoid architecture of the eosinophilic or clear neoplastic cells with necrosis and high mitotic activity. In some areas, non-adhesive tumor cells with eccentric nuclei were observed. Immunohistochemically (IHC), the tumor cells are positive for TFE3 and the renal tubular markers (PAX2 and PAX8), and completely negative for SMARCB1, an oncosuppressor protein. Break-apart florescence in situ hybridization and reverse transcription polymerase chain reaction confirmed TFE3 rearrangement on Xp11.2 and the presence of ASPSCR1-TFE3 fusion gene. DNA sequencing revealed a frameshift mutation in exon 4 of SMARCB1 gene. Conclusion: It is important to recognize this rare RCC with both TFE3 rearrangement and SMARCB1 inactivation, as the prognosis and therapeutic strategies, particularly targeted therapies for such tumors, might be different.

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出版当年[2015]版:
大类 | 3 区 医学
小类 | 3 区 病理学
最新[2025]版:
大类 | 3 区 医学
小类 | 3 区 病理学
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出版当年[2014]版:
Q2 PATHOLOGY
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Q2 PATHOLOGY

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第一作者单位: [1]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Inst Pathol,Wuhan 430030,Peoples R China [2]Huazhong Univ Sci & Technol, Sch Basic Med Sci, Dept Pathol, Wuhan 430030, Peoples R China
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通讯机构: [1]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Inst Pathol,Wuhan 430030,Peoples R China [2]Huazhong Univ Sci & Technol, Sch Basic Med Sci, Dept Pathol, Wuhan 430030, Peoples R China
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