The Role of High Resolution Magnetic Resonance Imaging (mri) in Detecting Circumferential Resection Margin (crm) for the Prognosis of Rectal Cancer

Rectal cancer carries poor prognosis because of metastasis and local recurrence. Local recurrence has a profound effect on morbidity and quality of life. Therefore, preoperative staging of rectal cancer has an important impact on treatment plan. The main factor in predicting the local recurrence is the circumferential resection margin (CRM). Surgical resection with stage-appropriate neoadjuvant combined-modality therapy is the mainstay in the treatment of rectal cancer. Recently, high-resolution magnetic resonance imaging (MRI) is regarded as a superior modality in the preoperative assessment of CRM with high accuracy and reproducibility and for T staging of tumor. However MRI is less accurate in diagnosis of nodal involvement.