Abstract
Background: Endoscopic ultrasound (EUS) is the potential imaging modality to accurately evaluate local invasion and perirectal lymph nodes in rectal cancer. However, overstaging of early lesions and limitations such as operator and experience dependency, tolerance of patient, and limited range of depth of the transducer may affect the accuracy of EUS. The aim of this study was to assess the correlations of staging between EUS, CT and MRI before and after neoadjuvant chemoradiation (CCRT) and the accuracy of these images in staging rectal cancer.
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