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For: Monsellato I, Alongi F, Bertocchi E, Gori S, Ruffo G, Cassinotti E, Baldari L, Boni L, Pernazza G, Pulighe F, De Nisco C, Perinotti R, Morpurgo E, Contardo T, Mammano E, Elmore U, Delpini R, Rosati R, Perna F, Coratti A, Menegatti B, Gentilli S, Baroffio P, Buccianti P, Balestri R, Ceccarelli C, Torri V, Cavaliere D, Solaini L, Ercolani G, Traverso E, Fusco V, Rossi M, Priora F, Numico G, Franzone P, Orecchia S. Correction to: Standard (8 weeks) vs long (12 weeks) timing to minimally-invasive surgery after NeoAdjuvant Chemoradiotherapy for rectal cancer: a multicenter randomized controlled parallel group trial (TiMiSNAR). BMC Cancer 2020;20:128. [PMID: 32066408 PMCID: PMC7026949 DOI: 10.1186/s12885-020-6632-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open

For:	Monsellato I, Alongi F, Bertocchi E, Gori S, Ruffo G, Cassinotti E, Baldari L, Boni L, Pernazza G, Pulighe F, De Nisco C, Perinotti R, Morpurgo E, Contardo T, Mammano E, Elmore U, Delpini R, Rosati R, Perna F, Coratti A, Menegatti B, Gentilli S, Baroffio P, Buccianti P, Balestri R, Ceccarelli C, Torri V, Cavaliere D, Solaini L, Ercolani G, Traverso E, Fusco V, Rossi M, Priora F, Numico G, Franzone P, Orecchia S. Correction to: Standard (8 weeks) vs long (12 weeks) timing to minimally-invasive surgery after NeoAdjuvant Chemoradiotherapy for rectal cancer: a multicenter randomized controlled parallel group trial (TiMiSNAR). BMC Cancer 2020;20:128. [PMID: 32066408 PMCID: PMC7026949 DOI: 10.1186/s12885-020-6632-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open

Number	Cited by Other Article(s)
1	Pathologic complete response is associated with decreased morbidity following rectal cancer resection. Am J Surg 2020;222:390-394. [PMID: 33261851 DOI: 10.1016/j.amjsurg.2020.11.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 11/21/2020] [Accepted: 11/25/2020] [Indexed: 01/12/2023] Abstract BACKGROUND There are conflicting data regarding the relationship between pathologic complete response (pCR) and post-operative complications following rectal cancer resection. The objective of this study was to compare the rates of morbidity among pCR patients and non-pCR patients and to identify factors that predict pCR morbidity in a large national database. METHODS This is a retrospective study using American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) targeted proctectomy data (2016-18). Patients with neoadjuvant chemoradiation therapy followed by proctectomy were included, and divided into pCR and non-pCR groups according to final stage. The groups were compared with Student's t-test, Chi-squared or Fisher's exact test. Multivariate logistic regression models were constructed to estimate the association between pCR status and post-operative morbidity while adjusting for key covariates. RESULTS 244 pCR and 1656 non-pCR patients were included. pCR patients had higher body mass index (28.1 ± 6.2 vs. 29.1 ± 5.9 kg/m²; p = 0.01) and lower pre-operative stage (T stage, p = 0.03; N stage, p < 0.001). The groups were equivalent with respect to surgical approach, type of surgery, and operative time (p > 0.05). Post-operative complications in pCR patients were less frequent than in non-pCR patients (23.0% vs. 29.3%; p = 0.04). This association was robust to adjustment for confounders in logistic regression, as patients with pCR had decreased odds of post-operative morbidity (OR 0.66, CI [0.43, 0.96], p = 0.04). CONCLUSION pCR is associated with fewer post-operative complications compared to non-pCR, suggesting that pCR is not a marker of severe pelvic fibrosis. This difference may be due to underlying tumor biology, and associated increased technical challenges resecting larger, non-responsive tumors. Collapse Key Words Neoadjuvant chemoradiation Pathologic complete response Post-operative morbidity Proctectomy Rectal cancer Collapse MESH Headings Collapse Grants Collapse Affiliation(s) Collapse

Number

Cited by Other Article(s)

Pathologic complete response is associated with decreased morbidity following rectal cancer resection. Am J Surg 2020;222:390-394. [PMID: 33261851 DOI: 10.1016/j.amjsurg.2020.11.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 11/21/2020] [Accepted: 11/25/2020] [Indexed: 01/12/2023]

Abstract

BACKGROUND

There are conflicting data regarding the relationship between pathologic complete response (pCR) and post-operative complications following rectal cancer resection. The objective of this study was to compare the rates of morbidity among pCR patients and non-pCR patients and to identify factors that predict pCR morbidity in a large national database.

METHODS

This is a retrospective study using American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) targeted proctectomy data (2016-18). Patients with neoadjuvant chemoradiation therapy followed by proctectomy were included, and divided into pCR and non-pCR groups according to final stage. The groups were compared with Student's t-test, Chi-squared or Fisher's exact test. Multivariate logistic regression models were constructed to estimate the association between pCR status and post-operative morbidity while adjusting for key covariates.

RESULTS

244 pCR and 1656 non-pCR patients were included. pCR patients had higher body mass index (28.1 ± 6.2 vs. 29.1 ± 5.9 kg/m²; p = 0.01) and lower pre-operative stage (T stage, p = 0.03; N stage, p < 0.001). The groups were equivalent with respect to surgical approach, type of surgery, and operative time (p > 0.05). Post-operative complications in pCR patients were less frequent than in non-pCR patients (23.0% vs. 29.3%; p = 0.04). This association was robust to adjustment for confounders in logistic regression, as patients with pCR had decreased odds of post-operative morbidity (OR 0.66, CI [0.43, 0.96], p = 0.04).

CONCLUSION

pCR is associated with fewer post-operative complications compared to non-pCR, suggesting that pCR is not a marker of severe pelvic fibrosis. This difference may be due to underlying tumor biology, and associated increased technical challenges resecting larger, non-responsive tumors.

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