Esophageal cancer metastatic to kidney: report of 2 cases.

We report 2 cases of renal tumor secondary to an esophageal cancer and discovered during an examination for hematuria. Despite the history the existence of a renal tumor with no apparent metastatic spread and hematuria justified nephrectomy, which led to the confirmation of metastasis to the kidney. Metastases of esophageal cancers represent only 4.8 per cent of secondary renal tumors. The kidneys are the fourth most common metastatic site of esophageal cancers, generally associated with several other secondary localizations. Their clinical latency is common. The difficulty in diagnosing these tumors and the frequent failure of complementary examinations result from their character, that is nodular, small diameter, multiple and cortical.