Yield of Post-Acute Diverticulitis Colonoscopy for Ruling Out Colorectal Cancer.

Background and Aims: Colonoscopy is recommended post-acute diverticulitis (AD) to exclude underlying adenocarcinoma (CRC). However, post-AD colonoscopy utility remains controversial. We aimed to examine yield of post-AD colonoscopy in our majority-Hispanic patient population. Methods: Patients undergoing post-AD colonoscopy between 11/1/2015-7/31/2021 were identified from a prospectively maintained endoscopic database. AD cases without computed tomography confirmation were excluded. Pertinent data, including complicated vs uncomplicated AD, fecal immunochemical test (FIT) result post-AD/pre-colonoscopy, and number/type/location of non-advanced adenomas, advanced adenomas, and CRC, were abstracted. Analyses were conducted using two-sample Wilcoxon rank-sum and Fisher's exact tests. Results: 208 patients were included, of whom 62.0% had uncomplicated AD. Median age was 53, 54.3% were female, and 77.4% were Hispanic. Ninety non-advanced adenomas were detected in 45 patients (21.6%), in addition to advanced adenoma in eight patients (3.8%). Two patients (1.0%) had CRC, both of whom had complicated AD in the same location seen on imaging, and one of whom was FIT+ (the other had not undergone FIT). Patients with uncomplicated versus complicated AD had similarly low rates of advanced adenomas (4.7% vs. 2.5%, p=0.713). FIT data were available in 51 patients and positive in three (5.9%); non-advanced adenomas were found in all three FIT+ patients. No FIT- patient had an advanced adenoma or CRC. Conclusion: Colonoscopy post-AD is generally low yield, with CRC being rare and found only in those with complicated AD. Colonoscopy post-complicated AD appears advisable, whereas less invasive testing (e.g. FIT) may be considered post-uncomplicated AD to inform the need for colonoscopy.

Predictive Modeling of Colonoscopic Findings in a Fecal Immunochemical Test-Based Colorectal Cancer Screening Program.

BACKGROUND: The fecal immunochemical test (FIT) is the primary modality used by the Los Angeles County Department of Health Services (LADHS) for colorectal cancer (CRC) screening in average-risk patients. Some patients referred for FIT-positive diagnostic colonoscopy have neither adenomas nor more advanced pathology. We aimed to identify predictors of false-positive FIT (FP-FIT) results in our largely disenfranchised, low socioeconomic status population. METHODS: We conducted a retrospective study of 596 patients who underwent diagnostic colonoscopy following a positive screening FIT. Colonoscopies showing adenomas (or more advanced pathology) were considered positive. We employed multiple logistic and linear regression as well as machine learning models (MLMs) to identify clinical predictors of FP-FIT (primary outcome) and the presence of advanced adenomas (secondary outcome). RESULTS: Overall, 268 patients (45.0%) had a FP-FIT. Female sex and hemorrhoids (odds ratios [ORs] 1.59 and 1.89, respectively) were associated with increased odds of FP-FIT and fewer advanced adenomas (ß = - 0.658 and - 0.516, respectively). Conversely, increasing age and BMI (ORs 0.94 and 0.96, respectively) were associated with decreased odds of FP-FIT and a greater number of advanced adenomas (ß = 0.073 and 0.041, respectively). MLMs predicted FP-FIT with high specificity (93.8%) and presence of advanced adenoma with high sensitivity (94.4%). CONCLUSION: Increasing age and BMI are associated with lower odds of FP-FIT and greater number of advanced adenomas, while female sex and hemorrhoids are associated with higher odds of FP-FIT and fewer advanced adenomas. The presence of the aforementioned predictors may inform the decision to proceed with diagnostic colonoscopy in FIT-positive patients.

Medical professional liability in gastroenterology: definitions, trends, risk factors, provider behaviors, and implications.

Introduction: Medical professional liability (MPL) is a notable concern for many clinicians, especially in procedure-intensive specialties such as gastroenterology (GI). Comprehensive understanding of the basis for MPL claims can improve gastroenterologists' practice, lower MPL risk, and improve the overall patient care experience. This is particularly relevant in the setting of the increasing average compensation per paid GI-related MPL claim, and evolving healthcare delivery patterns and regulations.Areas Covered: MPL claims are generally grounded in the concept of negligence, a broad term that may apply to situations involving medical errors, ameliorable adverse events, inadequate informed consent and/or refusal, and numerous others. Though often not directly discussed in GI training or thereafter, there are various mechanisms and behaviors that can alter (decrease or increase) MPL risk. Additional dimensions of MPL include telemedicine, social media, and vicarious liability. We discuss these topics as well as takeaways to mitigate risk, thus reducing unnecessary clinician anxiety, promoting professional development, and optimizing healthcare outcomes.Expert Opinion: MPL risk is modifiable. Strong provider-patient relationships, through effective communication, patient reassurance, and enhanced informed consent, decrease risk, as does thorough documentation. Conversely, provider 'defensive' mechanisms intended to decrease MPL risk, including assurance and avoidance behaviors, may paradoxically increase it.