患者,女,52岁。因“B超发现右肾肿物2天”入院。无腹痛,无血尿及蛋白尿,无水肿,无高血压,不伴红细胞增多症。血常规、尿常规及生化检查均无异常。泌尿系B超检查见右肾中下极见一大小约3.7 cm×3.0 cm低回声团,边界欠清,内部回声不均匀。腹部CT平扫加增强示:右肾中下部实质见一类圆形软组密度影向外突出,平扫CT值 Patient, female, 52 years old. Because of “B-found right kidney tumor 2 days ” admission. No abdominal pain, no hematuria and proteinuria, no edema, no high blood pressure, without polycythemia. Blood, urine and biochemical tests were normal. B-urinary tract ultrasound showed that the right kidney, a very small size of about 3.7 cm × 3.0 cm low echo group, the border is not clear, the internal echo uneven. Abdominal CT scan and enhancement showed: the middle and lower right renal see a class of round soft group density outward prominent CT value