A case of XXXX which recurred ten years later from the initial operation.

@entity1 @entity20597 @entity1821 @entity5
A 58-year old @entity1 was referred to our hospital for treatment of an abdominal mass. As for him, @entity5 resection with right nephrectomy had been performed ten years ago for a giant well-differentiated @entity20597 . CT examination showed a huge @entity5 shadow in the abdominal cavity. Abdominal MRI examination showed a 15   8 cm @entity5 with almost high signal intensity on the T2 weighted images. At laparotomy, a large bulky @entity5 pointed out before an operation was found. Surgical extirpation of the @entity5 was performed. Besides, several @entity5 of the thumb head size were detected into right retroperitoneal fatty tissue. The right side mesocolon and the @entity5 were not able to exfoliate, therefore right hemicolectomy was performed. Histological features showed @entity1821 . The postoperative course was uneventful. But eight months after surgery, he was admitted again for treatment of a 4   3 cm @entity5 . Extirpation of the @entity5 was performed. Histological finding of this @entity5 also showed @entity1821 . Dedifferentiation, occurring in 15% of the well-differentiated @entity1821 , sometimes may develop later. Long-term detailed follow-up is necessary for well-differentiated @entity1821 .
