[A case of esophageal cancer metastatic to the kidney presenting as renal pelvic cancer].

A 50-year-old man, who had undergone operation of esophageal carcinoma 2 years earlier, was admitted with the complaints of right flank pain and macroscopic hematuria. Intravenous urogram showed right unvisualized kidney. Right retrograde pyelography showed the dilatation of calices and irregularity of middle and lower calices. Computed tomography revealed severe hydronephrosis of the right kidney. Right nephrectomy was performed under the diagnosis of either renal pelvic cancer or esophageal cancer metastatic to the kidney. Pathological examination revealed metastatic squamous cell carcinoma from esophagus. The patient was treated by radiotherapy but died 4 months after the surgical treatment. Literature on eight case of metastatic renal cancer from esophagus is reviewed.