Risk factors for symptomatic anastomotic postoperative recurrence following ileo-colic resection in Crohn's disease

The Reduction of Anastomosis-Related Morbidity Using the Kono-S Anastomosis in Patients with Crohn's Disease: A Meta-Analysis

(1) Background: we conducted this study to evaluate the effect of Kono-S anastomosis on postoperative morbidity after bowel resection for Crohn's disease. (2) Methods: This study adhered to the PRISMA guidelines and the Cochrane Handbook for Systematic Reviews of Interventions. The primary endpoint was the overall complications rate. Secondary outcomes included specific complications analyses, disease recurrence and efficiency endpoints. A systematic literature screening was performed in major electronic scholar databases (Medline, Scopus, Web of Science), from inception to 17 January 2024. Both Random (RE) and Fixed Effects (FE) models were estimated; the reported analysis was based on the Cochran Q test results. (3) Results: Overall, eight studies and 913 patients were included in this meta-analysis. Pooled analyses confirmed that Kono-S was not superior in terms of overall morbidity (OR: 0.69 [0.42, 1.15], p = 0.16). Kono-S displayed a reduced risk for anastomotic leakage (OR: 0.34 [0.16, 0.71], p = 0.004) and reoperation (OR: 0.12 [0.05, 0.27], p < 0.001), and a shortened length of hospital stay (WMD: -0.54 [-0.73, -0.34], p < 0.001). On the contrary, Kono-S results in higher rates of postoperative SSIs (OR: 1.85 [1.02, 3.35], p = 0.04). (4) Conclusions: This study confirms a comparable morbidity, but a lower risk of anastomotic leak and reoperation of Kono-S over conventional anastomoses. Further high quality studies are required to validate these findings.

Preoperative computed tomography enterography-based radiomics signature: A potential predictor of postoperative anastomotic recurrence in patients with Crohn's disease

BACKGROUND

More than half of patients with Crohn's disease (CD) require at least one surgery for symptom management; however, approximately half of the patients may experience postoperative anastomotic recurrence (PAR).

OBJECTIVES

This study aims to develop and validate a preoperative computed tomography enterography (CTE)-based radiomics signature to predict early PAR in CD.

DESIGN

A total of 186 patients with CD (training cohort, n = 134; test cohort, n = 52) who underwent preoperative CTE and surgery between January 2014 and June 2020 were included in this retrospective multi-centre study.

METHODS

106 radiomic features were initially extracted from intestinal lesions and peri-intestinal mesenteric fat, respectively; significant radiomic features were selected from them and then used to develop intestinal or mesenteric radiomics signatures, using the least absolute shrinkage and selection operator and a Cox regression model. A radiomics-based nomogram incorporating these signatures with clinical-radiological factors was created for comparison with a model based on clinical-radiological features alone.

RESULTS

68 of 134 patients in training cohort and 16 of 52 patients in test cohort suffered from PAR. The intestinal radiomic signature (hazard ratio [HR]: 2.17; 95% confidence interval [CI]: 1.32-3.58; P = 0.002) and mesenteric radiomic signature (HR: 2.19; 95% CI: 1.14-4.19; P = 0.018) were independent risk factors for PAR in the training cohort as per a multivariate analysis. The radiomics-based nomogram (C-index: 0.710; 95% CI: 0.672-0.748) yielded superior predictive performance than the clinical-radiological model (C-index, 0.607; 95% CI: 0.582-0.632) in the test cohort. Decision curve analysis demonstrated that the radiomics-based nomogram outperformed the clinical-radiological model in terms of clinical usefulness.

CONCLUSIONS

Preoperative mesenteric and intestinal CTE radiomics signatures are potential non-invasive predictors of PAR in postoperative patients with CD.

Benefit of risk-stratified prophylactic treatment on clinical outcome in post-operative Crohn's disease

BACKGROUND AND AIMS

While immediate post-operative treatment has shown effectiveness in reducing endoscopic post-operative recurrence (POR), evidence regarding the clinical benefit is limited. We compared rates of clinical POR in Crohn's disease (CD) patients receiving immediate prophylactic treatment with patients receiving endoscopy-driven treatment.

METHODS

We retrospectively collected data from 376 consecutive CD patients that underwent an ileocecal resection with anastomosis between 2007 and 2018 with at least 3 years of follow-up at 3 sites. Subsequently, high- and low-risk patients categorized by established guidelines who underwent endoscopy within 12 months postoperatively were grouped according to a prophylactic- or endoscopy-driven approach and compared for incidence and time till endoscopic- and clinical POR.

RESULTS

Prophylactic treatment reduced rates of- and time till endoscopic POR within 1 year in high-risk (HR 0.48, 95% CI 0.27-0.86, p=0.04, NNT=5) but not low-risk (HR 0.90, 95%CI 0.32-2.56, p=0.85) patients. Conversely, no significant differences in clinical POR within 3 years between prophylactic- and endoscopy-driven low-risk (HR 1.17, 95%CI 0.41-3.29, p=0.75) and high-risk patients were observed (HR 1.06, 95%CI 0.63-1.79, p=0.82, NNT=22). However, a large numerical albeit not statistical significant difference in 3 year clinical POR (28.6% vs. 62.5%, p=0.11) in a subset of high-risk patients with ≥3 or more ECCO-defined risk factors was observed, indicating a cumulative effect of having multiple risk factors.

CONCLUSION

Our observations favor step-up treatment guided by early endoscopic evaluation with prophylactic treatment reserved for carefully selected high-risk patients in order to avoid potential overtreatment of a significant number of patients.