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6p21 translocation renal cell carcinoma: A case report
Yuho Sano1, Ryuta Tanimoto1, Katsumi Sasaki1
1Department of Urology, Kagawa Prefectural Central Hospital, Japan.
Abstract:
6p21 translocation renal cell carcinoma (RCC) was newly classified in the WHO 2016 classification as a subtype of microphthalmia-associated transcription factor (MIT) family translocation RCC.A 42-year-old man was referred to our hospital with an asymptomatic solid mass in the right kidney identified during routine medical checkup. Computed tomography (CT) revealed a 14-mm buried-type solid mass accompanied by punctate calcification. CT-guided biopsy suggested clear-cell carcinoma. He underwent robotic-assisted partial nephrectomy. Pathological findings revealed 6p21 translocation RCC based on diffuse nuclear immunoreactivity for TFEB and TFEB gene rearrangement in tumor cells by FISH analysis.
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