Prognostic Value of Pretreatment Carcinoembryonic Antigen (CEA) in Rectal Cancer Treated with Preoperative Short-Course Radiotherapy with Delayed Surgery or Long-Course Radiotherapy.

12 Kleiman et al reported that normalization of CEA levels (< 3.0 μg/L) was a highly significant predictor of pCR after preoperative chemoradiation with external beam radiotherapy of 25 to 60 Gy or brachytherapy of 26 Gy in 4 fractions. 13 Our previous study found that elevated CEA level (≥ 10 ng/mL) predicted local recurrence, DM, and OS after postoperative chemoradiation with 45 to 50.4 Gy i

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