KHẢO SÁT CÁC ĐẶC ĐIỂM KHỐI U TRÊN CỘNG HƯỞNG TỪ GIÚP DỰ BÁO DI CĂN HẠCH TRONG UNG THƯ TRỰC TRÀNG

Abstract

Objective: To identify MRI tumor characteristics associated with predicting lymph node metastasis (LNM) in rectal cancer (RC) and to develop a model combining tumor features on MRI with ESGAR criteria for nodal diagnosis. Subjects and Methods: A cross-sectional study was conducted on 130 patients with rectal cancer who underwent preoperative rectal MRI before curative surgery at the University Medical Center Ho Chi Minh City. Tumor characteristics and nodal status were assessed according to ESGAR criteria and compared with pathological findings. Logistic regression analysis was used to determine independent predictors of LNM. Results and Conclusion: MRI provides several tumor characteristics valuable for predicting LNM. Significant factors included tumor size, extramural vascular invasion, minimum ADC value, and ADC difference. Among these, the minimum ADC value was an independent predictor of LNM. Combining minimum ADC with ESGAR 2016 criteria, AUC value improved from 0,72 to 0,84