A case of renal mucinous tubular and spindle cell carcinoma |
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Authors: | Manabu Kato Norihito Soga Kiminobu Arima Yoshiki Sugimura |
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Affiliation: | Division of Nephro-Urologic Surgery and Andrology, Department of Reparative and Regenerative Medicine, Institute of Medical Life Science Mie University Graduate School of Medicine, Tsu, Mie, Japan |
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Abstract: | A 33-year-old man was hospitalized for treatment of a left renal tumor. The radiological findings were consistent with those of a left renal cell carcinoma (RCC). Subsequently, a radical nephrectomy was carried out. Macroscopic examination showed that a well-demarcated tumor measuring 2.9 × 2.6 × 2.5 cm was present in the middle portion of the resected kidney. The cut surface of the tumor was grayish-white in color. Pathological examination of the resected specimen showed a mucinous tubular and spindle cell carcinoma of the kidney (MTSCC-K). MTSCC-K is a low-grade renal epithelial neoplasm that has recently been recognized as a specific entity in the World Health Organization 2004 classification of RCC. To our knowledge, 17 cases of MTSCC-K in Japan have been reported by Japanese investigators. To avoid administration of excessive adjuvant treatment to patients, pathologists and urologists should consider this newly recognized low-grade malignancy when diagnosing renal tumors. |
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Keywords: | differential diagnosis kidney mucinous tubular and spindle cell carcinoma papillary renal cell carcinoma renal cell carcinoma |
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