A case of @entity8880 is reported. A 56-year-old @entity1 was admitted with the complaint of an abdominal mass. Right transabdominal nephrectomy was performed on January 23, 1984. The resected kidney weighed 262 g and contained a well-demarcated 5 X 5 X 4 cm @entity5 in the middle portion. The cross section of the @entity5 was tan-brown. Light microscopic examination disclosed that the greater part of the @entity5 was composed of cells with abundant, and finely granular eosinophilic cytoplasm and with moderate nuclear pleomorphism. Electron microscopic examination confirmed that the cytoplasm had numerous mitochondria and few other organelles. According to these findings, the @entity5 was diagnosed as @entity8880 . Furthermore, it is noteworthy that in this case there were tubular arrangement of the cells resembling proximal renal tubules in a focal area and a group of cells with considerable nuclear atypia and hyperchromatism in another area. The @entity1 has been well without any local recurrence or distant @entity3 ten months after the operation. In addition, fourteen cases of @entity8880 in Japan, including the present case, are reviewed.

[A case of XXXX ].

@entity1 :: ('9606', 'Species') :: ['woman', 'patient'] @entity8880 :: ('MESH:C537750', 'Disease') :: ['renal oncocytoma'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor'] @entity3 :: ('MESH:D009362', 'Disease') :: ['metastasis']
@entity8880 :: (MESH:C537750,Disease) :: ['renal oncocytoma']
