Gross prosector analysis of perivesicular adipose tumor invasion is the sole differentiator between pT3 substages, and gross evaluation is critical to lymph node identification. Gross prosector impact on pT3 subclassification and lymph node counts in cystectomy specimens resected for bladder cancer has not been previously analyzed. Both pT3 subclassification and total number of lymph nodes removed at radical cystectomy for bladder cancer are considered important components of the pathology report; however, both have controversial prognostic significance. Our objective was to assess the impact of the gross prosector on pT3 substaging and lymph node count. Pathology reports from 560 cystectomy cases performed for primary bladder cancer were reviewed. Educational interventions regarding cystectomy gross prosector documentation were conducted. Gross prosectors did not document the presence or absence of macroscopic perivesicular adipose invasion in 17% of cases. There was a decrease in the frequency of cases lacking documentation after educational intervention (33% to 5%, P
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