Incidence of Secondary Renal Tumor, Surgical Treatment for Metastatic Malignancy to the Kidney: Clinical and Pathological Features

Objective: The present study aims to evaluate the clinical and pathological features of secondary renal tumors, which constitute only a few cases of renal tumors, and to present our experience in the surgical treatment of metastatic malignant disease to the kidney. Methods: Data of 420 patients who underwent surgical treatment with a diagnosis of renal tumor between January 2005 and December 2011 were analyzed. The clinical and pathological data of the patients with secondary renal tumor were presented. Results: Secondary renal tumor was detected in 12 (2.8%) of 420 patients who underwent surgery with a diagnosis of renal tumor. Tumors were incidentally detected in 10 patients (83.3%), while they were detected in 2 patients (16.6%) due to symptoms of hematuria. The primary tumor site of patients with secondary renal tumor was the lung in 4 patients (33.3%), gastrointestinal tract in 4 patients (33.3%), hematopoietic system in 3 patients (25%), and genital tract in 1 patient (8.4%). Conclusion: In renal metastatic disease, the metastasis can be removed in appropriate patients by evaluating the situation of primary disease so as not to cause morbidity. Nephrectomy may be required in some cases that occur in renal metastatic disease, such as uncontrollable hematuria. (JAREM 2014; 4: 111-4)