During the last 10 years, 18 patients affected by kidney neoplasia have been operated on conservatively (2 patients with bilateral carcinoma, 1 patient with damaged controlateral kidney, and 15 patients with controlateral healthy kidney). All the tumors were smaller than 5 cm. In 14 cases the histological examination showed the tumor as being renal cell carcinoma, in 3 cases oncocytoma and in 1 case angiomyolipoma. All the patients had a normal post operative course and are alive with a mean follow up of 21.1 months.
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