例１女，６６岁。右腰痛３月余，ＣＴ平扫及增强均见右肾盂被铸形的高密度影充填，边界光整，密度均匀（图１），右肾实质变薄，其强化程度明显不如左侧，ＣＴ诊断为右肾鹿角形结石伴右肾功能受损。手术及病理：右肾积水，未见结石，右肾盂输尿管连接部狭窄。复习病史，患者既 Example 1 Female, 66 years old. Right lower back pain more than 3 months, CT scan and enhancement were found in the right renal pelvis was cast high-density filling, border finishing, uniform density (Figure 1), the right renal parenchyma, the degree of enhancement was significantly better than the left, CT Diagnosis of right kidney antler stones with impaired renal function. Surgery and pathology: right hydronephrosis, no stones, the right ureteropelvic junction stenosis. Review history, patients both