Univariate Cox regression analysis showed that pathological grade, tumor diameter, tumor number, lymph node metastasis, pathological stage, and NUSAP1 expression were significantly associated with the 5-year recurrence-free survival (RFS) (p < 0.05, see Table 6) and 5-year overall survival (OS) (p < 0.05, see Table 7) after radical surgery for BUC. The gene discussed is NUSAP1; the disease is neoplasm.