Pancreatic Metastasis From Clear Cell Renal Cell Carcinoma: Outcome of an Aggressive Approach

ObjectiveTo evaluate the long-term results of patients surgically treated for metastatic clear cell renal cell carcinoma (CCRCC) with a unique pancreatic secondary localization to assess the importance of radical treatment in this rare group of patients.Patients and MethodsThis is a retrospective monocentric study including 20 surgically treated patients between 1997 and 2012 for a unique pancreatic metastasis of a CCRCC. The main objective was to evaluate the outcome after surgical resection.ResultsTwenty patients were followed up for a CCRCC. The M/F ratio was 1.2. The average age of onset of kidney cancer was 57.05 ± 7.78 years. Two patients who had synchronous pancreatic metastasis and 18 patients who had metachronous metastasis appeared after an average of 130 ± 59 months (24-240 months). The average size of the metastases was 20 ± 11.6 mm. Pancreatic metastasis was unique in all patients, with 35% of patients having multiple lesions of the pancreas. All patients underwent a pancreatic resection of metastasis. Histologic examination confirmed the location of a secondary CCRCC in all patients. Median follow-up after pancreatectomy was 69 months (1-150 months). Disease-free survival at 2 years was 60%. Overall survival rates at 2 and 4 years were 79% and 72%, respectively. There was no difference found between patients with multiple and unique pancreatic metastases in overall survival.ConclusionUnique pancreatic metastasis of CCRCC is rare. The literature on this subject is limited. Surgical resection might be an option and can be associated with long-term disease-free intervals in highly selected patients.