Five-year oncological outcomes after selective neoadjuvant radiotherapy for resectable rectal cancer

Abstract Introduction The role and optimal regimen of radiotherapy in curative-intent treatment of metastatic rectal cancer is unclear and hence a single arm meta-analysis was performed. Method Medline, Embase and Cochrane Library databases were searched up to 16 May 2020. A Meta-analysis of binomial data was performed using a Freeman-Tukey double arcsine transformation, and pooled estimates were used to construct risk ratios and confidence intervals via the Katz-logarithmic method. Additionally, comparative meta-analysis was performed with the Mantel Haenszel model. Results 18 studies were included. Rectal pathological complete response (pCR) was observed in 14% of tumours treated with radiotherapy (n = 57/388, CI 0.07 to 0.23). Comparative meta-analysis of cohort studies showed that treatment regimens including radiotherapy were associated with higher pT1 tumour and better oncological outcomes compared to regimens without radiotherapy. Katz-logarithmic method showed that neoadjuvant radiotherapy had a higher proportion of pN0 staging (RR = 1.81, 95% CI 1.06 to 3.09, p = 0.029) and better oncological outcomes compared to adjuvant radiotherapy, and that short course radiotherapy (SCRT) had a lower proportion of pT3 tumours (RR = 0.778, 95% CI 0.609 to 0.994, p = 0.044) and similar oncological outcomes compared to long course radiotherapy (LCRT). Conclusions This study supports the evidence that radiotherapy should be used in curative intent metastatic rectal cancer.

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Evaluation of Hematological/Pathological Prognostic Factors and Oncological Outcomes of Patients with Locally Advanced Rectal Cancer Treated with Neoadjuvant Radiotherapy

Turkish Journal of Oncology ◽

10.5505/tjo.2019.2148 ◽

2020 ◽

Author(s):

Gülhan GÜLER AVCI

Keyword(s):

Rectal Cancer ◽

Prognostic Factors ◽

Locally Advanced ◽

Advanced Rectal Cancer ◽

Locally Advanced Rectal Cancer ◽

Neoadjuvant Radiotherapy ◽

Oncological Outcomes

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Surgery, Radio- and Chemo- therapy for Multimodal Treatment of Rectal Cancer

Swiss Surgery ◽

10.1024/1023-9332.7.6.256 ◽

2001 ◽

Vol 7 (6) ◽

pp. 256-274 ◽

Cited By ~ 2

Author(s):

Link ◽

Staib ◽

Kornmann ◽

Formentini ◽

Schatz ◽

...

Keyword(s):

Rectal Cancer ◽

Multimodal Treatment ◽

Local Relapse ◽

Phase Iii ◽

Neoadjuvant Radiotherapy ◽

Term Survival ◽

Primary Tumors ◽

Impact On Survival ◽

Relapse Rates

The possibilities and results of multimodal treatment in rectal cancer were reviewed with respect to the results of surgical treatment only. Based on the results of 4 studies, reducing local relapse rates and increasing long term survival rates significantly, postoperative radiochemotherapy (RCT) + chemotherapy (CT) should remain the recommended standard for R0 resected UICC II and III rectal cancers. The addition of RT to adjuvant CT reduces local relapses without significant impact on survival (NSABP R-02). Vice versa, the addition of CT to RT or an improved CT in the RCT-concept prolongs survival. Preoperative neoadjuvant radiotherapy (RT) reduced local relapse rates in 9 studies, and extended survival in one study that evaluated all eligible patients. Preoperative RT reduced local relapse rates in addition to total mesorectal excision (TME) but did not extend survival. The preoperative RCT + CT downstages resectable and nonresectable tumors and induces a higher sphincter preservation rate. Phase III data justifying its routine use in all UICC II + III stages are not yet available. This treatment may be routinely applied in nonresectable primary tumors or local relapses. Preoperative RCT (or RT) may evolve as standard, if the patient selection is improved and postoperative morbidity and long term toxicity reduced. Intraoperative RT could be added to this concept or be used together with preoperative/postoperative RT at the same indications. Postoperative adjuvant RT reduced local relapses significantly in a single trial, and no impact on survival time is reported. Since postoperative RT is inferior to preoperative RT, this treatment cannot be recommended, if RT is chosen as a single treatment modality in adjunction to surgery. The results of local tumor excisions may be improved with pre- or postoperative RCT + CT. In the future, multimodal treatment of rectal cancer might be more effective, if individualized according to prognostic factors.

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VEGFA and PlGF Protein Signature of Primary Stage IV Rectal Cancer Pre and Post Neoadjuvant Radiotherapy, Bevacizumab, and Chemotherapy

Current Angiogenesis ◽

10.2174/221155280303150311155109 ◽

2015 ◽

Vol 3 (3) ◽

pp. 164-173

Author(s):

Karin Tamas ◽

Tonnis H. van Dijk ◽

Urszula M. Domanska ◽

Hetty Timmer-Bosscha ◽

Klaas Havenga ◽

...

Keyword(s):

Rectal Cancer ◽

Stage Iv ◽

Neoadjuvant Radiotherapy ◽

Primary Stage ◽

Protein Signature

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Postoperative non-steroidal anti-inflammatory drug use and oncological outcomes of rectal cancer

BJS Open ◽

10.1093/bjsopen/zraa050 ◽

2021 ◽

Vol 5 (1) ◽

Author(s):

O Grahn ◽

M Lundin ◽

M-L Lydrup ◽

E Angenete ◽

M Rutegård

Keyword(s):

Rectal Cancer ◽

Propensity Score ◽

Propensity Score Matching ◽

Instrumental Variables ◽

Cox Regression ◽

Recurrence Free Survival ◽

Free Survival ◽

Oncological Outcomes ◽

Anti Inflammatory ◽

Instrumental Variables Approach

Abstract Background Non-steroidal anti-inflammatory drugs (NSAIDs) are known to suppress the inflammatory response after surgery and are often used for pain control. This study aimed to investigate NSAID use after radical surgical resection for rectal cancer and long-term oncological outcomes. Methods A cohort of patients who underwent anterior resection for rectal cancer between 2007 and 2013 in 15 hospitals in Sweden was investigated retrospectively. Data were obtained from the Swedish Colorectal Cancer Registry and medical records; follow-up was undertaken until July 2019. Patients who received NSAID treatment for at least 2 days after surgery were compared with controls who did not, and the primary outcome was recurrence-free survival. Cox regression modelling with confounder adjustment, propensity score matching, and an instrumental variables approach were used; missing data were handled by multiple imputation. Results The cohort included 1341 patients, 362 (27.0 per cent) of whom received NSAIDs after operation. In analyses using conventional regression and propensity score matching, there was no significant association between postoperative NSAID use and recurrence-free survival (adjusted hazard ratio (HR) 1.02, 0.79 to 1.33). The instrumental variables approach, including individual hospital as the instrumental variable and clinicopathological variables as co-variables, suggested a potential improvement in the NSAID group (HR 0.61, 0.38 to 0.99). Conclusion Conventional modelling did not demonstrate an association between postoperative NSAID use and recurrence-free survival in patients with rectal cancer, although an instrumental variables approach suggested a potential benefit.

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A Commentary on “Long-term oncological outcomes in robotic versus laparoscopic approach for rectal cancer: A systematic review and meta-analysis” (Int J Surg 2020; 80:225-230)

International Journal of Surgery ◽

10.1016/j.ijsu.2021.106006 ◽

2021 ◽

pp. 106006

Author(s):

Xiaofei Li

Keyword(s):

Systematic Review ◽

Rectal Cancer ◽

Meta Analysis ◽

Laparoscopic Approach ◽

Oncological Outcomes

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Retrospective study of the functional and oncological outcomes of conformal sphincter preservation operation in the treatment of very low rectal cancer

Techniques in Coloproctology ◽

10.1007/s10151-020-02229-2 ◽

2020 ◽

Vol 24 (10) ◽

pp. 1025-1034 ◽

Cited By ~ 1

Author(s):

G. Sun ◽

Z. Lou ◽

H. Zhang ◽

G. Y. Yu ◽

K. Zheng ◽

...

Keyword(s):

Rectal Cancer ◽

Rectal Wall ◽

Anal Verge ◽

Disease Free Survival ◽

Sphincter Preservation ◽

Low Rectal Cancer ◽

Anal Function ◽

Oncological Outcomes ◽

Rectal Cancers ◽

Very Low Rectal Cancer

Abstract Background Conformal sphincter preservation operation (CSPO) is a new surgical procedure for very low rectal cancers (within 4–5 cm from the anal verge). CSPO preserves more of the dentate line and distal rectal wall and also avoids injuring nerves in the intersphincteric space, resulting in satisfactory anal function after resection. The aim of this study was to analyze the short-term surgical results and long-term oncological and functional outcomes of CSPO. Methods Consecutive patients with very low rectal cancer, who had CSPO between January 2011 and October 2018 at Changhai Hospital, Shanghai were included. Patient demographics, clinicopathological features, oncological outcomes and anal function were analyzed. Results A total of 102 patients (67 men) with a mean age of 56.9 ± 10.8 years were included. The median distance of the tumor from the anal verge was 3 (IQR, 3–4) cm. Thirty-five patients received neoadjuvant chemoradiation (nCRT). The median distal resection margin (DRM) was 0.5 (IQR, 0.3–0.8) cm. One patient had a positive DRM. All circumferential margins were negative. There was no perioperative mortality. The postoperative complication rate was 19.6%. The median duration of follow-up was 28 (IQR, 12–45.5) months. The local recurrence rate was 2% and distant metastasis rate was 10.8%. The 3-year overall survival and disease-free survival rates were 100% and 83.9%, respectively. The mean Wexner incontinence and low anterior resection syndrome scores 12 months after ileostomy reversal were 5.9 ± 4.3, and 29.2 ± 6.9, respectively. Conclusions For patients with very low rectal cancers, fecal continence can be preserved with CSPO without compromising oncological results.

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