CLINICAL TRIAL, PHASE II
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Total neoadjuvant treatment (CAPOX plus radiotherapy) for patients with locally advanced rectal cancer with high risk factors: A phase 2 trial.

BACKGROUND AND PURPOSE: To evaluate the safety and efficacy of Total neoadjuvant treatment (TNT) in patients with rectal cancer with high risk factors.

METHODS AND MATERIALS: We did this phase 2 trial in patients who were diagnosed with stage II-III rectal cancer with at least one of the high risk factors. Three cycles of induction CAPOX were followed by pelvic radiotherapy of 50.4 Gy/28 fractions and two cycles of concurrent CAPOX. Three cycles of consolidation CAPOX were delivered after radiotherapy. Primary endpoints were pathological complete response (pCR) and R0 resection.

RESULTS: Fifty patients were enrolled and 47 patients were evaluable. A total of 34 patients (72.3%) completed 6 to 8 cycles of chemotherapy and 46 patients (98%) completed the planned radiotherapy. 17 patients (36%) achieved a pCR or clinical complete response (cCR). Three cCR patients (6.4%) refused the operation and selected a watch-and-wait approach. The most common grade 3 or worse adverse events were leucopenia (10.6%) and radiation dermatitis (6.4%). The major surgical complications included pelvic abscesses/infection in 2 patients (4.3%), anastomotic leakage and hemorrhage in1 patient (2.2%), respectively, which were all addressed with conservative management.

CONCLUSIONS: TNT is effective and safe in patients with locally advanced rectal cancer with high risk factors. Long-term efficacies of TNT need to be further evaluated. This trial is registered with Chinese Clinical Trial Registry, number ChiCTR-OIN-17012284.

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