Magnetic Resonance Imaging in Benign and Malignant Rectal Neoplasms
Magnetic resonance imaging (MRI) is an accurate method for preoperative rectal cancer staging. The similarity with anatomy provides surgeons a clear view of local regional rectal cancer spread. Information detected through MRI is important to carefully plan adequate surgical management for each particular rectal cancer case. Data on cancer local status before neoadjuvant chemoradiation can be compared with posttreatment status to evaluate the magnitude of downstaging. Lymph node status should also be studied and taken into consideration whenever surgical treatment for rectal cancer is indicated, even before the number and lymph node volume regression occurs as a result of preoperative treatment regimens. Images acquired after neoadjuvant treatment are equally important to define surgical strategy. Imaging techniques and incidences as well as their surgical implications are contemplated in this chapter.
KeywordsRectal Cancer Total Mesorectal Excision Circumferential Resection Margin Resolution Magnetic Resonance Imaging Pelvic Side Wall
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