Mp31-04 comparison of Surgical Intervention Rate Based on Age for T1a Kidney Cancers in the United States From 2011 to 2015

Abstract

Tumors with a PC had a larger diameter than those without (31 vs. 26 mm; P [ 0.0008). A PC was observed in 92% of clear cell, 89% of papillary, and 86% of clear cell papillary RCC cases compared to only 50% in chromophobe RCC cases (P < 0.0001). Sex, age, Furman grade, and tumor complexity did not differ among patients. A multivariate analysis showed that smaller tumor size (! 34 vs. < 34 mm, odds ratio [OR]: 3.31; P [ 0.0023) and chromophobe RCC (vs. other subtypes, OR: 12.5; P < 0.0001) predicted an absence of PC.CONCLUSIONS: Small tumor size and chromophobe RCC were significant predictors of a lack of PC, suggesting that a positive surgical margin must be avoided for these tumors when an enucleation technique is employed for partial nephrectomy.