Abstract
Objective To compare the value of transrectal ultrasonography(TRUS) and magnetic resonance(MR) in preoperative estimation of circumferential resection margin(CRM) of mid-low rectal cancer. Methods Both TRUS and MR were performed prior to surgery in 111 patients with mid-low rectal cancer. The CRM was evaluated and compared with the postoperative pathologic findings. Results The accuracy of TRUS and MR for CRM was 91.9%(102/111) and 85.6%(95/111), respectively, there was no statistical difference between them(P=0.137). Their specificities were 94.0%(79/84)and 84.5% (71/84), there was statistical difference between them(P=0.046). The consistency of the results between TRUS and pathology was better than that between MR and pathology(Kappa1=0.783, Kappa2=0.652). Conclusions TRUS is proved to have an important diagnostic value for CRM of mid-low rectal cancer. Key words: Endosonography; Rectal neoplasms; Circumferential resection margin; Magnetic resonance imaging
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