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由于B超及CT在临床广泛应用，无症状肾肿瘤日益增多。尽管一些是良性的，如肾血管平滑肌脂肪瘤，但大多数为恶性肿瘤。对1981年元月～1996年5月收治的90例肾肿瘤进行回顾和分析，27例（30％）为偶然发现的，而其中88．9％为恶性肿瘤。临床资料无症状性肾肿瘤指患者无任何有关肾
As B ultrasound and CT are widely used in clinical, asymptomatic renal tumors are increasing. Although some are benign, such as renal angiomyolipoma, most are malignant tumors. Ninety patients with renal tumors who were treated between January 1981 and May 1996 were reviewed and analyzed. Twenty-seven patients (30%) were found by chance and 88.9% of them were malignant tumors. Asymptomatic renal tumor clinical data refers to the patient without any kidney