Titlebook: Radiological Imaging of the Ureter; Francis Joffre (Professor, Chef de Service),Philip Book 2003 Springer-Verlag Berlin Heidelberg 2003 Tu

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Medical Radiologyhttp://image.papertrans.cn/r/image/820771.jpg

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978-3-642-62994-5Springer-Verlag Berlin Heidelberg 2003

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Ureteral Obstruction,Whitaker has suggested a practical and useful defi - nition of urinary tract obstruction: “A narrowing of the urinary tract, such that the proximal pressure must be raised to transmit the usual fl ow through it” (Whitaker 1978b). The key factor of obstruction is blockade of urine fl ow, which leads to increased pressure in the collecting system.

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Ureteral Tumors,Ureteral tumors are rare and usually of urothelial origin. Urothelial tumors are most frequently malignant, and their prognosis is variable, depending on their degree of differentiation (grading) and their extension through the ureteral wall (staging). Much rarer are tumors of connective tissue origin, which are most frequently benign (Table 6.1).

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