逆行肾盂造影时输尿管导管弯曲，呈“S”形。
On retrograde pyelography the catheter is curved as"S"shape.
逆行肾盂造影检查21例，插管不成功5例，输尿管充盈缺损16例(76%)。
Retrograde pyelography showed filling defect of the diseased ureter in 16 (76%) of 21 cases (5 cases had failure of intubation).
方法：搜集82例经手术病理证实的肾癌病例，就其B超、X线(静脉或逆行肾盂造影)、CT、MRI及血管造影表现及误诊原因进行回顾性分析。
Methods: in this retrospectively study, the B-US, X-ray, ct, MRI and angiography findings of 82 patients of renal carcinoma, proved by operation, were analyzed for misdiagnosis.
方法：搜集82例经手术病理证实的肾癌病例，就其B超、X线(静脉或逆行肾盂造影)、CT、MRI及血管造影表现及误诊原因进行回顾性分析。
Methods: in this retrospectively study, the B-US, X-ray, ct, MRI and angiography findings of 82 patients of renal carcinoma, proved by operation, were analyzed for misdiagnosis.
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