THE ROLE OF PELVIC MAGNETIC RESONANCE IMAGING FOR PREOPERATIVE STAGING OF MIDDLE AND LOWER RECTAL CANCER
Main Article Content
Abstract
Background: Colorectal cancer is one of the most common cancers of the gastrointestinal tract. Local recurrence is related to circumferential resection margin. Preoperative staging has an important role in management strategy of rectal cancer and the evaluation of mesorectal fascia (MRF) involvement is necessary before the treatment. Magnetic Resonance (MR) imaging has become a preferred diagnostic tool for the preoperative assessment of local staging and CRM in patients with rectal cancer. Objectives: to assess the role of pelvic MR imaging in preoperative staging of rectal carcinoma and to get prediction of mesorectal fascia involvement. Materials and method: We evaluated 106 patients with middle and lower rectal cancer who had the indication for radical surgery in University Medical Center at Ho Chi Minh City from 06/2015 to 03/2018. We performed preoperative pelvic MRI for local staging. Preoperative staging for rectal cancer by MR imaging obtained and compared to postoperative histopathologic results. Results: The accuracy rate of pelvic MR imaging for determining the T stage of rectal cancer was 100% (T1), 94.3% (T2), 92.5% (T3) and 98.1% (T4) respectively. The accuracy rate of detecting lymph node metastases was 89.6% (N0), 87.7% (N1) and 98.1% (N2) respectively. The sensitivity, specificity and accuracy rate of MR imaging for prediction of MRF involvement were 96.2%, 95.0% and 95.3% respectively. Conclusion: Pelvic MR imaging is a promising technique which is an accurate preoperative local staging of rectal cancer and for prediction of MRF involvement.
Article Details
Keywords
Rectal cancer, MR Imaging, mesorectal fascia, circumferential resection margin, rectal cancer staging
References
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