胸膜転移,多発骨転移で発見された小径腎細胞癌の1例

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The patient is a 69-year-oldmale. His chief complaint was chest pain. Because imaging studies suggestedpleural mesothelioma associatedwith multiple bone metastases, right pleural tumor resection was performed. Pathological diagnosis was metastatic pleural tumor, and renal cell carcinoma (RCC) was suspectedas its origin. Dynamic computedtomography showeda small tumor in the right kidney. The tumor was 15 mm in diameter and consistent with RCC. Laparoscopic radical nephrectomy was performed for the right kidney. Pathological diagnosis was RCC, clear cell carcinoma with sarcomatoid component, T1aN0M1, stage IV. Sorafenib therapy was started46 days after the operation as a systemic therapy, and stable disease has been maintained. Generally, small RCC is assumed to have a good prognosis. However, a small percentage of patients with small RCC have distant metastasis at the time of diagnosis, and the prognosis is reportedto be poor. We report this case, anda review of the literature.
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