Renal Fossa Recurrence of a Renal Cell Carcinoma 13 Years after Nephrectomy: A Case Report

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Abstract
Between 1980 and 1995, we performed a nephrectomy with curative intent on 183 patients with renal cell carcinoma at Nagoya University Hospital. Among these patients, 5 (2.7%) developed renal fossa recurrence (median follow‐up, 65 months). We report a case of such a recurrence found 13 years after a nephrectomy for renal cell carcinoma (stage pT3a, pNO, MO). A 62‐year‐old female presented with a nodule on her back. Computed tomography and magnetic resonance imaging revealed a mass in the right back and retroperitoneum, and a biopsy revealed the tumor to be a renal cell carcinoma. Complete resection was performed, followed by administration of a‐interferon. The patient is doing well 16 months after the operation. The case illustrates that very long‐term follow‐up after a nephrectomy is mandatory for patients with perinephric invasion of a renal cell carcinoma due to the risk of renal fossa recurrence.