摘要To the Editor: Spontaneous ureteral rupture is rare, and urolithiasis is the most common cause.[1,2] The underlying mechanism may be the pressure around the ureteral wall due to stone impaction or a tear during the stone passage.Smaller distal stones exert higher intraureteral pressures than do larger proximal stones because of the greater length of obstructed ureter and the smaller diameter of the distal ureter.
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