Short- and long-term results of open vs laparoscopic multisegmental resection and anastomosis for synchronous colorectal cancer located in separate segments

BACKGROUND It remains unclear whether laparoscopic multisegmental resection and ana-stomosis(LMRA)is safe and advantageous over traditional open multisegmental resection and anastomosis(OMRA)for treating synchronous colorectal cancer(SCRC)located in separate segments.AIM To compare the short-term efficacy and long-term prognosis of OMRA as well as LMRA for SCRC located in separate segments.METHODS Patients with SCRC who underwent surgery between January 2010 and December 2021 at the Cancer Hospital,Chinese Academy of Medical Sciences and the Peking University First Hospital were retrospectively recruited.In accordance with the RESULTS LMRA patients showed markedly less intraoperative blood loss than OMRA patients(100 vs 200 mL,P=0.006).Compared to OMRA patients,LMRA patients exhibited markedly shorter postoperative first exhaust time(2 vs 3 d,P=0.001),postoperative first fluid intake time(3 vs 4 d,P=0.012),and postoperative hospital stay(9 vs 12 d,P=0.002).The incidence of total postoperative complications(Clavien-Dindo grade:≥II)was 2.9%and 17.1%(P=0.025)in the LMRA and OMRA groups,respectively,while the incidence of anastomotic leakage was 2.9%and 7.3%(P=0.558)in the LMRA and OMRA groups,respectively.Furthermore,the LMRA group had a higher mean number of lymph nodes dissected than the OMRA group(45.2 vs 37.3,P=0.020).The 5-year overall survival(OS)and disease-free survival(DFS)rates in OMRA patients were 82.9%and 78.3%,respectively,while these rates in LMRA patients were 78.2%and 72.8%,respectively.Multivariate prognostic analysis revealed that N stage[OS:HR hazard ratio(HR)=10.161,P=0.026;DFS:HR=13.017,P=0.013],but not the surgical method(LMRA/OMRA)(OS:HR=0.834,P=0.749;DFS:HR=0.812,P=0.712),was the independent influencing factor in the OS and DFS of patients with SCRC.CONCLUSION LMRA is safe and feasible for patients with SCRC located in separate segments.Compared to OMRA,the LMRA approach has more advantages related to short-term efficacy.

Long-term outcomes and failure patterns after laparoscopic intersphincteric resection in ultralow rectal cancers

BACKGROUND Intersphincteric resection(ISR),the ultimate anus-preserving technique for ultralow rectal cancers,is an alternative to abdominoperineal resection(APR).The failure patterns and risk factors for local recurrence and distant metastasis remain controversial and require further investigation.AIM To investigate the long-term outcomes and failure patterns after laparoscopic ISR in ultralow rectal cancers.METHODS Patients who underwent laparoscopic ISR(LsISR)at Peking University First Hospital between January 2012 and December 2020 were retrospectively reviewed.Correlation analysis was performed using the Chi-square or Pearson's correlation test.Prognostic factors for overall survival(OS),local recurrence-free survival(LRFS),and distant metastasis-free survival(DMFS)were analyzed using Cox regression.RESULTS We enrolled 368 patients with a median follow-up of 42 mo.Local recurrence and distant metastasis occurred in 13(3.5%)and 42(11.4%)cases,respectively.The 3-year OS,LRFS,and DMFS rates were 91.3%,97.1%,and 90.1%,respectively Multivariate analyses revealed that LRFS was associated with positive lymph node status[hazard ratio(HR)=5.411,95%confidence interval(CI)=1.413-20.722,P=0.014]and poor differentiation(HR=3.739,95%CI:1.171-11.937,P=0.026),whereas the independent prognostic factors for DMFS were positive lymph node status(HR=2.445,95%CI:1.272-4.698,P=0.007)and(y)pT3 stage(HR=2.741,95%CI:1.225-6.137,P=0.014).CONCLUSION This study confirmed the oncological safety of LsISR for ultralow rectal cancer.Poor differentiation,(y)pT3 stage,and lymph node metastasis are independent risk factors for treatment failure after LsISR,and thus patients with these factors should be carefully managed with optimal neoadjuvant therapy,and for patients with a high risk of local recurrence(N+or poor differentiation),extended radical resection(such as APR instead of ISR)may be more effective.