Abstract：Objective: To explore the characteristics of the primary ureteral carcinoma and discuss the value of spiral CT(SCT) in diagnosis of it. Methods: The SCT findings of primary ureteral carcinoma in 16 cases were analysed and compared with histopathological diagnosis. Results: The transverse diameters of the lesions were 1.0~2.1cm, and the longitudinal involvement lengths were from 1.5~15.2cm. There were no statistically significant differences(P＞0.1) in diameters and lengths among the low staging group(pT0~T2) and the high staging group(pT3~T4). The average CT value of the lesion was 43HU on plain scanning, and 73HU on CE scanning. The increasement of CT value was 30HU. The lesions were clearer on CE scanning. Curved planar reconstruction(CPR) can show the entire course of the urinary tract. Among 6 cases of pT3 stage, CT diagnosed accurately in 1 case. For 2 cases of pT4 stage, CT diagnosis was right. Conclusion: The carcinomatous lesions spread along the ureter. The longitudinal length were longer than the transverse diameters, but tumor cannot be staged merely according to the diameter and length. For stage T0~T3, CT differentiation was difficult, for stage T4, all CT diagnosis were accurate. Contrast enhancement CT scanning plays an important role in confirming and differentiating diagnosis. CPR offered a direct and easy observing images for clinical doctors.
2006, Vol. 17 
