Value of magnetic resonance imaging in evaluating TNM stage of rectal cancer

Objective: To discuss the value of magnetic resonance imaging (MRI) in preoperative tumor node metastasis (TNM) staging of rectal cancer. Methods: A total of 60 patients with rectal cancer confirmed by both surgical and pathological approaches were enrolled from September 2017 to April 2019. The preoperative MRI results of all patients were collected for TNM staging; results of which were later compared with the staging results of postoperative pathological specimens, and the correlation analysis was performed. Results: The overall accuracy of preoperative TNM staging of rectal cancer was 86.67%, with a Kappa value of 0.760 (P=0.020). Pearson correlation analysis showed a significant correlation between the data from TNM staging and from pathological staging (P<0.05). The area under the receiver operating characteristic curve was 0.726 (P=0.001). Conclusion: MRI shows a high accuracy in preoperative TNM staging of rectal cancer, which is conducive to the development of it in therapeutic regimens.