Tumor Size Predicts Muscle-invasive and Non-organ-confined Disease in Upper Tract Urothelial Carcinoma at Radical Nephroureterectomy.

Pathological stage and grade of renal pelvis urothelial carcinoma (RPUC) are difficult to estimate before radical nephroureterectomy (RNU).

To examine tumor size as an independent predictor of muscle-invasive and/or non-organ-confined rates of RPUC at RNU.