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Nephron Sparing Surgery for Renal Mass: Is There Any Difference between Oncocytoma and Malignant Lesions
Zaher Bahouth1, Sarel Halachmi, Ismael Masarwa
1Department of Urology, Bnai-Zion Medical Center, Faculty of Medicine, Technion, Haifa, Israel.
Introduction:
A relatively high proportion of patients who undergo partial or radical nephrectomy for enhancing renal mass actually have oncocytoma, a benign renal tumor. Several parameters have been shown to be typical for oncocytoma, but only a small number of patients present with these parameters. The aim of our study was to report the clinical, operative and postoperative characteristics of patients who underwent nephron-sparing surgery in our center with a histopathological diagnosis of oncocytoma compared to patients with malignant renal tumor.
Patients And Methods:
Sixty-three out of 530 patients who underwent nephron-sparing surgery for enhancing renal mass were diagnosed with oncocytoma. Clinical and radiological features and operational data of these patients were compared with patients who had malignant renal tumors.
Results:
Mean age of patients with histologically proven non-malignant oncocytoma was significantly higher than that in patients with malignant renal cell carcinoma (66.7 vs. 61.4 years). All other analyzed variables showed no significant difference between the 2 groups.
Conclusions:
No reliable clinical, operative or radiological parameters can differentiate preoperatively between oncocytoma and malignant renal neoplasms.
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