Abstract

Purpose: To evaluate the role of MRI in staging of rectal cancer according to AJCC 8th staging. Material and Methods: A cross sectional study with 31 histiologically proven rectal cancer patients treated at Hue Central Hospital from 01/2022 to 05/2023. Results: The accuracy of MRI in diagnosing stage T rectal cancer according to the AJCC 8th staging is 93.5% with Kappa coefficient = 0.866. The sensitivity, specificity, and accuracy of each stage were T1-T2: 75%, 100%, 75%; T3: 100%, 81.8%, 90.9%; T4: 100%, 100%, 100%. About 12.9% of patients invaded the mesorectal fascia (MRF +) on MRI. There was only 1 case of EMVI+. The sensitivity, specificity, and accuracy of MRI in dectecting lymph node metastasis was 80%, 66.7%,71%. Conclusion: MRI appears to be a highly accurate modality so when application AJCC 8th staging be can preoperative staging and decision-making treatment of rectal cancer