[Two cases of metastatic renal tumor]

Two cases of metastatic renal tumor are reported, one in a 78-year-old male who had undergone total gastrectomy for gastric carcinoma, and the other in a 45-year-old female who had undergone hysterectomy for cervical carcinoma of the uterus. The chief complaint was flank pain and nephrectomy was performed in both cases. Histopathological examination of the removed specimen revealed metastatic renal tumor the primary site of which was probably the stomach in the first case and cervix uteri in the second case. The literature on metastatic renal tumors in Japan is reviewed.