Accuracy and Influencing Factors of T Restaging by Endorectal Ultrasonography after Neoadjuvant Chemora-diotherapy for Rectal Cancer
Objective To investigate the accuracy and influencing factors of T restaging by endorectal ul-trasonography(ERUS)after neoadjuvant chemoradiotherapy.Methods Sixty patients with rectal cancer admitted to our hospital from 2020 to 2023 were selected as study participants,all of whom received neo-adjuvant chemoradiotherapy.ERUS was used to evaluate tumor T staging after treatment.T staging of postoperative pathological diagnosis was used as the gold standard,and the accuracy rate of ERUS was compared among patients with different age,gender,tumor location,follow-up time and other data.Multi-variate logistic regression analysis was performed by using data with significant differences between groups as independent variables.Results In 60 patients with rectal cancer,the accuracy rate of T staging was 70.0％(42/60)after neoadjuvant chemoradiotherapy.There were significant differences in the accuracy of T staging evaluation of ERUS in patients with different follow-up time,tumor location and Wheeler regres-sion grade(P＜0.05).There was no significant difference in the accuracy rate among patients with differ-ent age,gender,vascular invasion or lymph node metastasis(P＞0.05).Logistic regression analysis showed that low rectal cancer and follow-up time＜6 weeks were influential factors for the accuracy of T restaging of ERUS.Conclusion After neoadjuvant chemoradiotherapy for rectal cancer,a preliminary T-restaging evaluation can be performed by ERUS diagnosis,but the accuracy of evaluation may be influ-enced by low rectal cancer and short follow-up time.
Rectal cancerNeoadjuvant chemo radio therapyEndorectal ultrasonographyT restagingAccuracyInfluencing factor
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