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Recently, there have been a few reports of renal cell carcinoma (RCC) cases with anaplastic lymphoma kinase (
We screened 829 RCCs by ALK immunohistochemistry, and performed fluorescence
One ALK-positive case was found. Initial diagnosis of this case was papillary RCC type 2. This comprises 0.12% of all RCCs (1/829) and 1.9% of papillary RCCs (1/53). This patient was a 44-year-old male with RCC found during routine health check-up. He was alive without evidence of disease 12 years after surgery. The tumor showed a papillary and tubular pattern, and showed positivity for CD10 (focal), epithelial membrane antigen, cytokeratin 7, pan-cytokeratin, PAX-2, and vimentin.
We found the first RCC case with
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