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DIAGNOSTIC ACCURACY OF MAGNETIC RESONANCE IMAGING FOR ASSESSMENT OF LOCAL INVASION AND LYMPH NODE METASTASIS IN RECTAL CANCER
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Abstract
Background: Rectal cancer is one of the most common cancers of the gastrointestinal tract. Early diagnosis and accurate staging are necessary to select the most appropriate treatment. Magnetic resonance imaging (MRI) has become a preferred diagnostic tool for preoperative staging and assessing the status of mesorectal fascia (MRF) in patients with rectal cancer. Objectives: To describe the characteristics of rectal cancer on MRI and to evaluate the diagnostic accuracy of MRI for the assessment of local invasion and lymph node metastasis in rectal cancer. Materials and methods: From March 2021 to May 2023, a prospective cross-sectional descriptive study was conducted on patients hospitalized in Can Tho University of Medicine and Pharmacy Hospital, preoperatively examined with MRI, underwent surgery, and pathologically proven rectal cancer. Results: A total of 53 patients (31 males and 22 females, with the age of 37-85 years) were included in the study. The accuracy of MRI for detecting the T stage of rectal cancer was 92.4%. The sensitivity, specificity, and accuracy of MRI for the prediction of MRF invasion were 93.3 %, 92.1%, and 92.5% respectively. The accuracy in detecting lymph node metastases was 86.7%. Conclusion: MRI appears to be a highly accurate modality for preoperative staging and decision-making treatment of rectal cancer.
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Keywords
rectal cancer, magnetic resonance imaging, local invasion, lymph node metastasis
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