Accuracy of conventional MRI combined with DWI in the diagnosis of preoperative staging of rectal cancer and analysis of the causes of missed diagnosis and misdiagnosis
Accuracy of conventional MRI combined with DWI in the diagnosis of preoperative staging of rectal cancer and analysis of the causes of missed diagnosis and misdiagnosis
Objective To discuss the accuracy of conventional magnetic resonance imaging(MRI)combined with diffusion-weighted imaging(DWI)in the diagnosis of preoperative staging of rectal cancer and the reasons for missed diagnosis and misdiagnosis.Methods Fifty-eight patients with rectal cancer in our hospital were selected retrospectively from January 2020 to February 2023.All patients received routine MRI sequence combined with DWI examination and pathological examination,and the gold standard was the result of pathological examination.The detection results of T and N stages diagnosed by conventional MRI combined with DWI and pathological examination before operation were compared.The diagnostic efficiency of preoperative routine MRI combined with DWI in T and N staging was evaluated,and the related imaging pictures were analyzed.Results Pathological results showed that among 58 patients with rectal cancer,there were 13 cases in T1 stage,16 cases in T2 stage,19 cases in T3 stage and 10 cases in T4 stage.There were 24 cases in N0 stage,18 cases in N1 stage,7 cases in N2a stage and 9 cases in N2b stage.The results of conventional MRI combined with DWI imaging showed that among 58 patients with rectal cancer,there were 10 cases in T1 stage,15 cases in T2 stage,17 cases in T3 stage and 16 cases in T4 stage.There were 22 cases in N0 stage,20 cases in N1 stage,8 cases in N2a stage and 8 cases in N2b stage.The results were close to the pathological results.The specificity,sensitivity and accuracy of conventional MRI combined with DWI imaging in examining T and N staging were high.Conclusion Clinically,the preoperative tumor staging of rectal cancer patients can be comprehensively evaluated according to the results of conventional MRI combined with DWI diagnosis and imaging characteristics,so as to further improve its accuracy and reduce missed diagnosis and misdiagnosis.
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