Tuberculous pyelitis showed deformed renal pelvis, filling defect and hydronephrosis.

结核性肾CT为肾及部分肾大盏变形、盈缺损及积水征。

Stagnation of urine in the kidney pelvis seems to greatly encourage pyelitis.

看起来，肾潴留可能大大地促使肾肾的发生。