The association between cholecystectomy and colorectal neoplasm in inflammatory bowel diseases: A population-based cohort study

The Impact of Cholecystectomy on Long-Term Disease Outcomes and Quality of Life in Patients with Crohn's Disease

BACKGROUND

Cholecystectomy (CCY) is one of the most frequently performed abdominal surgeries. However, the impact of CCY in clinical settings with altered gastrointestinal physiology and anatomy, such as Crohn's disease (CD), has not been fully characterized. We sought to investigate clinical outcomes, disease severity, and quality of life of CD patients after CCY.

METHODS

We utilized a prospective, longitudinal registry of consented CD patients followed at a tertiary center. Crohn's disease patients that had or had not undergone CCY formed the 2 study groups. The absence or presence of gallbladder was confirmed with abdominal CT scans obtained during routine care. Multiyear clinical, biochemical, and histologic data were collected and analyzed.

RESULTS

Among 834 CD patients, 151 (18%) had undergone CCY. History of CCY was associated with higher disease activity (median Harvey-Bradshaw index; P < 0.001), more years with anemia (P = 0.048), lower albumin (P = 0.001), worse quality of life (mean Short Inflammatory Bowel Disease Questionnaire; P < 0.001), chronic abdominal pain (P < 0.001), higher risk for incident colonic dysplasia (P = 0.011), higher rates of annual hospital admissions (P = 0.004), and opioid use (P < 0.001). In multivariate analysis, CCY remained associated with higher disease activity (P < 0.001), lower albumin (P = 0.008), lower quality of life (P < 0.001), and more hospital admissions (P = 0.008), whereas CD patients with diseased ileum had higher risk for colonic dysplasia (P = 0.031).

CONCLUSIONS

CCY in CD patients was associated with multiple markers of disease activity and worse quality of life during multiyear follow up. This data suggests that CCY in CD patients may adversely impact the long-term clinical course.

The Risk of Colorectal Cancer After Cholecystectomy or Appendectomy: A Population-based Cohort Study in Korea

Objectives

We investigated the association between cholecystectomy or appendectomy and the subsequent risk of colorectal cancer (CRC) in the Korean population.

Methods

A retrospective cohort study was conducted with the National Health Insurance Service–National Sample Cohort of Korea; this sample was followed up from January 1, 2002, until the date of CRC incidence, loss to follow-up, or December 31, 2015. The exposure status of cholecystectomy and appendectomy was treated as a time-varying covariate. The calculated risk of CRC was stratified by follow-up period, and the association between these surgical procedures and CRC was investigated by a Cox regression model applying appropriate lag periods.

Results

A total of 707 663 individuals were identified for analysis. The study population was followed up for an average of 13.66 years, and 4324 CRC cases were identified. The hazard ratio (HR) of CRC was elevated in the first year after cholecystectomy (HR, 1.71; 95% confidence interval [CI], 1.01 to 2.89) and in the first year and 2-3 years after appendectomy (HR, 4.22; 95% CI, 2.87 to 6.20; HR, 2.34; 95% CI, 1.36 to 4.03, respectively). The HRs of CRC after applying 1 year of lag after cholecystectomy and 3 years of lag after appendectomy were 0.80 (95% CI, 0.57 to 1.13) and 0.77 (95% CI, 0.51 to 1.16), respectively.

Conclusions

The risk of CRC increased in the first year after cholecystectomy and appendectomy, implying the possibility of bias. When appropriate lag periods after surgery were applied, no association was found between cholecystectomy or appendectomy and CRC.