Neoadjuvant chemoradiation combined with radical surgery has been established as the standard care for locally advanced rectal cancer(T3-T4 and/or N1-N2). Approximately 20% patients who achieve complete pathological response have an improved prognosis. Appropriate patient selection may help avoid over-treatment. Evaluation of treatment response mostly with imaging study and pathology after neoadjuvant chemoradiation and following surgery is essential for the subsequent selection of treatment strategy.