A case of renal mucinous tubular and spindle cell carcinoma.
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 x 2.6 x 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.
Kato
Manabu
M
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. uroclin2@clin.medic.mie-u.ac.jp
Soga
Norihito
N
Arima
Kiminobu
K
Sugimura
Yoshiki
Y
D002288:Adenocarcinoma, Mucinous / Q000473:pathology*; D000328:Adult; D002277:Carcinoma / Q000473:pathology*; D006801:Humans; D007680:Kidney Neoplasms / Q000473:pathology*; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000473:pathology*