The National Comprehensive Cancer Network (NCCN) states that favorable criteria for nephron preservation include low-grade tumor (based on cytology and biopsy), papillary architecture, tumor size < 1.5 cm, unifocal tumor, and cross-sectional imaging showing no concern for invasive disease.
Less favorable criteria include high-grade tumor, flat or sessile architecture, tumor size > 1.5 cm, multifocal tumors, cT2-T4 tumors, mid- and proximal ureteral position (owing to technical challenges), and tumor crossing infundibulum or the ureteropelvic junction.
Learn more about surgical management of UUTUC.
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Cite this: Kyle A. Richards. Fast Five Quiz: Upper Urinary Tract Urothelial Carcinoma (UUTUC) - Medscape - Aug 13, 2020.