Purpose: To analyze the treatment outcomes for sigmoid volvulus (SV) and identify risk factors of complications and mortality. Methods: Observational study of all consecutive adult patients diagnosed with SV who were admitted from January 2000 to December 2020 in a tertiary university institution for conservative management, urgent or elective surgery. Primary outcomes were 30-day postoperative morbidity, mortality and 2-year overall survival (OS), including analysis of risk factors for postoperative morbidity or mortality and prognostic factors for 2-year OS. Results: A total of 92 patients were included. Conservative management was performed in 43 cases (46.7%), 27 patients (29.4%) underwent emergent surgery and 22 (23.9%) were scheduled for elective surgery. Successful decompression was achieved in 87.8% of cases, but the recurrence rate was 47.2%. Mortality rates following episodes were higher for conservative treatment than for urgent or elective surgery (37.2%, 22.2%, 9.1%, respectively; p = 0.044). ASA score > III was an independent risk factor for complications (OR = 5.570, 95% CI = 1.740–17.829, p < 0.001) and mortality (OR = 6.139, 95% CI = 2.629–14.335, p < 0.001) in the 30 days after admission. Patients who underwent elective surgery showed higher 2-year OS than those with conservative treatment (p = 0.011). Elective surgery (HR = 2.604, 95% CI = 1.185–5.714, p = 0.017) and ASA score > III (HR = 0.351, 95% CI = 0.192–0.641, p = 0.001) were independent prognostic factors for 2-year OS. Conclusion: Successful endoscopic decompression can be achieved in most SV patients, but with the drawbacks of high recurrence, morbidity and mortality rates. Concurrent severe comorbidities and conservative treatment were independent prognostic factors for morbidity and survival in SV.

Purpose: This study aimed to develop a prognostic model for colorectal cancer (CRC) patients using biomarkers from routine preoperative peripheral blood examinations combined with clinical factors. Methods: This observational study comprised CRC patients (stages I–III) who underwent curative surgery between January 2011 and December 2019. Study variables included patient demographics, tumour characteristics, and immune/inflammatory markers from preoperative blood tests. Cut-off thresholds for continuous variables were determined using maximally selected rank statistics. Univariate and multivariate analyses identified variables associated with 3-year cancer-specific survival (CSS) and disease-free survival (DFS). Cox regression models were developed and validated using a random split-sample approach. Nomograms based on these models were constructed, and receiver operating characteristic (ROC) curves were generated for 12, 24 and 36 months. Results: A total of 764 patients were included. Independent factors for 3-year DFS included laparoscopic surgery, prognostic nutritional index (PNI), neutrophil count, lymphocyte count, and Charlson comorbidity index. The DFS prediction model showed AUC values of 66.6%, 64.8%, and 69% for years 1, 2, and 3, respectively. For CSS, independent factors included age, systemic immune-inflammation index (SII), serum albumin, and platelet count, with AUC values of 89.2%, 76.8%, and 71% for years 1, 2, and 3. The most significant contributors to the CSS model were SII and platelet cut-off values. Conclusion: Inflammatory biomarkers combined with clinical parameters robustly predict 3-year survival outcomes in CRC patients undergoing curative resection. These findings highlight the importance of systemic inflammation in CRC prognosis and support its inclusion in preoperative risk stratification.

Purpose: To analyze short-term outcomes of curative-intent cancer surgery in all adult patients diagnosed with colorectal cancer undergoing surgery from January 2010 to December 2019 and determine risk factors for postoperative complications and mortality. Methods: Retrospective study conducted at a single tertiary university institution. Patients were stratified by age into two groups: < 75 years and ≥ 75 years. Primary outcome was the influence of age on 30-day complications and mortality. Independent risk factors for postoperative adverse events or mortality were analyzed, and two novel nomograms were constructed. Results: Of the 1486 patients included, 580 were older (≥ 75 years). Older subjects presented more comorbidities and tumors were located mainly in right colon (45.7%). After matching, no between-group differences in surgical postoperative complications were observed. The 30-day mortality rate was 5.3% for the older and 0.8% for the non-older group (p < 0.001). In multivariable analysis, the independent risk factors for postoperative complications were peripheral vascular disease, chronic pulmonary disease, severe liver disease, postoperative transfusion, and surgical approach. Independent risk factors for 30-day mortality were age ≥ 80 years, cerebrovascular disease, severe liver disease, and postoperative transfusion. The model was internally and externally validated, showing high accuracy. Conclusion: Patients aged ≥ 75 years had similar postoperative complications but higher 30-day mortality than their younger counterparts. Patients with peripheral vascular disease, chronic pulmonary disease, or severe liver disease should be informed of higher postoperative complications. But patients aged ≥ 80 suffering cerebrovascular disease, severe liver disease, or needing postoperative transfusion should be warned of significantly increased risk of postoperative mortality.

Purpose: Three types of circular staplers can be used to perform a colorectal anastomosis: two-row (MCS), three-row (TRCS) and powered (PCS) devices. The objective of this meta-analysis has been to provide the existing evidence on which of these circular staplers would have a lower risk of presenting a leak (AL) and/or anastomotic bleeding (AB). Methods: An in-depth search was carried out in the electronic bibliographic databases Embase, PubMed and SCOPUS. Observational studies were included, since randomized clinical trials comparing circular staplers were not found. Results: In the case of AL, seven studies met the inclusion criteria in the PCS group and four in the TRCS group. In the case of AB, only four studies could be included in the analysis in the PCS group. The AL OR reported for PCS was 0.402 (95%-confidence interval (95%-CI): 0.266–0.608) and for AB: 0.2 (95% CI: 0.08–0.52). The OR obtained for AL in TRCS was 0.446 (95%-CI: 0.217 to 0.916). Risk difference for AL in PCS was − 0.06 (95% CI: − 0.07 to − 0.04) and in TRCS was − 0.04 (95%-CI: − 0.08 to − 0.01). Subgroup analysis did not report significant differences between groups. On the other hand, the AB OR obtained for PCS was 0.2 (95% CI: 0.08–0.52). In this case, no significant differences were observed in subgroup analysis. Conclusion: PCS presented a significantly lower risk of leakage and anastomotic bleeding while TRCS only demonstrated a risk reduction in AL. Risk difference of AL was superior in the PCS than in TRCS.

Purpose: This meta-analysis aims to evaluate the efficacy of powered circular staplers (PCS) compared to manual circular staplers (MCS) in reducing anastomotic leakage (AL) and postoperative bleeding (AB) in colorectal surgery. Methods: Extensive searches were performed in the Embase, PubMed, and SCOPUS electronic bibliographic databases. Most studies were of an observational nature, and only one randomized clinical trial was identified. Results: Twelve studies met the inclusion criteria for anastomotic leakage and five for anastomotic hemorrhage. The number of patients included for AL analysis was 4524. The leakage rate was 4.6% (208 cases). The number of patients with AB was 2868 with a bleeding rate of 4.99% (143 patients). After identifying outliers and studies with possible selection bias, the odds ratio (OR) for leaks and PCS was 0.38 (95% CI 0.26–0.55), the relative risk was − 0.05 (95% CI − 0.07 to 0.03), and the number needed to treat to prevent one leak was 20. For bleeding, the PCS OR for PCS was 0.20 (95% CI 0.0772–0.5177). Conclusion: Powered circular staplers could be associated with a significantly lower risk of leakage and anastomotic bleeding than two-row manual circular staplers. Further prospective randomized trials are needed to validate these findings.