Difficult Biliary Cannulation in Endoscopic Retrograde Cholangiopancreatography: Definitions, Risk Factors, and Implications

Over the past 50 years, endoscopic retrograde cholangiopancreatography (ERCP) has become the preferred minimally invasive method of treating a vast array of pancreatobiliary diseases. An initial sine qua non for ERCP success is selective ductal cannulation. Despite significant progress in the optimisation of ERCP methods and accessories, selective biliary cannulation using conventional techniques remains unsuccessful in approximately 15% of native papilla cases. Furthermore, difficult biliary cannulation has been associated with an increased risk of post-ERCP pancreatitis, among other adverse events. Here, in the first of a two-part series, the authors provide a primer on standard biliary cannulation techniques and discuss the definition, risk factors, and implications of difficult biliary cannulation. The second part of the series will provide an overview of the existing advanced techniques used in cases of difficult biliary cannulation as well as the approach to their selection.

Elevated Glucagon in a Patient with Necrolytic Acral Erythema: A Case Report and Review of the Literature

Necrolytic acral erythema (NAE) is a relatively newly described dermatologic disease that is often associated with hepatitis C virus (HCV). Oral zinc therapy is a successful treatment; however, therapy is often delayed due to misdiagnosis. There are limited reports of NAE in the literature. This paper presents a case of NAE in a 68-year-old male with untreated HCV, whose NAE was diagnosed and treated as recurrent cellulitis for 12 years. He had low serum zinc and elevated serum glucagon levels. Elevated glucagon is not often reported in NAE, but the patient’s CT abdomen was negative, ruling out glucagonoma and necrolytic migratory erythema. He improved with oral zinc replacement and was referred to the hepatology department for HCV treatment. This paper additionally presents a review of the literature for NAE cases.

Frequency Distribution of Hepatitis C Virus Genotypes with Reference to Age and Sex in Various Districts of Khyber Pakhtunkhwa, Pakistan

Background: Pakistan has the second highest prevalence of hepatitis C in the world after Egypt. Viral hepatitis is a leading cause of morbidity and mortality in Pakistan and, worryingly, reinfection rates are also on the rise. This cross-sectional study was aimed at finding the most common genotypes of hepatitis C in terms of age and sex in a Pakistani cohort. Materials and methods: The authors collected blood samples from 1,260 patients with diagnosed hepatitis C visiting a primary teaching hospital affiliated with Peshawar Medical College, Pakistan, from different districts of Khyber Pakhtunkhwa, Pakistan, between January 2017 and April 2019. Hepatitis C virus RNA was quantified by real-time polymerase chain reaction and genotyping was then performed. Results: The authors found that genotype 3a was the most prevalent type followed by 1a, mixed, and 3b, respectively. Genotypes 2a and 1b were the least prevalent in Khyber Pakhtunkhwa. The most common genotype was 3a, observed in 75.87% of cases. The most common mixed genotype was 3a+1a, observed in 39 cases (3.10%); it had a prevalence of 3.49% in females compared with 2.70% in males. Overall, the most common age group affected by hepatitis C virus was 41–50 years (31.35%), followed by the 51–60 years group (24.45%). Infection rate was comparatively low in other age groups. A significant difference was observed in the prevalence of genotype 3a and 2a among different districts. Conclusion: The authors concluded that genotype 3a was the most prevalent genotype and it was observed more frequently in the female population, with a median age of 45 years.

Difficult Biliary Cannulation in Endoscopic Retrograde Cholangiopancreatography: An Overview of Advanced Techniques

Endoscopic retrograde cholangiopancreatography (ERCP) plays a significant role in the treatment of a vast array of pancreatobiliary diseases. However, despite significant progress in the optimisation of ERCP methods and accessories, the technical and clinical success of ERCP can vary significantly due to a variety of patient and operator factors. Over the past several decades, a number of advanced techniques have been developed to improve cannulation success rates, including the use of double-guidewire, pancreatic duct accessory-assisted, precut, and rendezvous techniques. Here, the authors provide an update and overview of the existing advanced techniques used in cases of difficult biliary cannulation, as well as the approach to their selection.

Hepatic Encephalopathy: A Review

Hepatic encephalopathy (HE) is a reversible syndrome observed in patients with liver disease. The syndrome is characterised by a spectrum of neuropsychiatric abnormalities resulting from the accumulation of neurotoxic substances in the bloodstream and ultimately in the brain. HE is a huge burden to patients, caregivers, and the healthcare system. Common treatments for HE, including rifaximin and lactulose, have been shown to reduce the risk of recurrence, frequency of hospitalisations, hospital costs, and mortality. New research and therapeutics exist, including faecal transplants and small-molecule therapies such as branched-chain amino acids. This review article provides a general overview of the current understanding of HE.

Gastrointestinal Manifestations and Liver Injury: Correlation with Mortality and Clinical Outcomes in Patients with COVID-19

Background and aims: Reports indicate that patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection present with gastrointestinal (GI) manifestations and abnormal liver function; however, the impact on clinical findings is unclear. The aim of this study is to report the impact of gastrointestinal and liver injury (LI) associated with coronavirus disease (COVID-19). Material and methods: The authors retrospectively evaluated patients who presented to the emergency department and were diagnosed with COVID-19 by PCR nasopharyngeal swab. Primary outcomes were the impact of GI findings and LI on in-hospital mortality. Secondary outcomes were length of stay in hospital and need for intensive care unit (ICU) level care. Results: Of the entire cohort, 64.0% had LI during hospitalisation. LI was present in 88.7% of those who died. In multivariate analysis, GI manifestations were associated with decreased risk of mortality (odds ratio [OR]: 0.46; 95% confidence interval [CI]: 0.24–0.90; p=0.002). GI symptoms did not impact length of stay, 5.06 days for patients with GI symptoms versus 4.74 in patients without (OR: 1.01; 95% CI: 0.96–1.07; p=0.43), or need for ICU (OR: 0.97; 95% CI: 0.60–1.58; p=0.9076) (Table 1). In multivariate analysis, LI was associated with increased mortality (OR: 8.60; 95% CI: 3.49–21.15; p<0.0001), need for ICU (OR: 10.94; 95% CI: 4.07–29.45; p<0.0001), and length of stay 5.87 days versus 3.01 days (OR: 1.23; 95% CI: 1.14–1.32; p<0.0001). Conclusion: The results of the data analysis show that GI symptoms may inversely correlate with mortality, while LI is associated with increased mortality, length of stay, and ICU admission.

Rethink Your Transjugular Intrahepatic Portosystemic Shunt (TIPS): Pre-TIPS Infection Predicts Post-TIPS Infection and Post-TIPS Portosystemic Encephalopathy

Objective: Transjugular intrahepatic portosystemic shunt (TIPS) is used for decompression of elevated portal pressure; however, there are potential complications. The aim of this study was to compare the risk of complications of TIPS in those who had an episode of infection within 6 months prior to TIPS to those without an infection prior. Methods: A retrospective chart review was performed on patients who underwent TIPS at a single transplant centre over 8 years. They were divided into two groups: patients without infection during the 6 months prior to TIPS (n=349) and those with an infection prior (bacterial/fungal) (n=53). The Wilcoxon rank-sum test was used to compare continuous variables while chi-squared analysis and Fisher’s exact test was used for categorical variables. Multiple logistic regression was used to ascertain the association between pre-TIPS infection status and likelihood of post-TIPS infection. Results: In the group of patients who had an infection before TIPS, 26.4% (n=14) had an episode of infection after the procedure, while in the group without infection prior, 16.2% (n=55) had an infection after the procedure (p=0.047; odds ratio: 2.08). In the pre-TIPS infection group, 54.7% (n=29) had an episode of portosystemic encephalopathy post-TIPS versus 39.6% (n=134) in the group without infection before TIPS (p=0.046; odds ratio: 1.93). Conclusion: Pre-TIPS infection within 6 months of TIPS procedure is a risk factor for post-TIPS portosystemic encephalopathy and infection. Further studies are needed to determine the potential benefit of antibiotic prophylaxis in patients who had an infection in the 6 months preceding TIPS placement.

Liver Disorders in Inflammatory Bowel Disease

Abnormal liver tests are frequent in patients with inflammatory bowel disease. These may occur at the time of diagnosis or throughout the course of the disease. There are multiple aetiologies, such as concomitant diseases and extraintestinal manifestations of the same disease, primary sclerosing cholangitis being the most characteristic. Other aetiologies include adverse reactions to the drugs used in the treatment of these patients. This review will evaluate the different causes of liver test abnormalities.

Cholangioscopy and its Primary Sclerosing Cholangitis

Primary sclerosing cholangitis (PSC) is a cholestatic liver disease characterised by chronic inflammation and fibro-obliteration of the intrahepatic and/or extrahepatic bile ducts. It is associated with numerous hepatobiliary complications including an increased risk of malignancy (in particular, cholangiocarcinoma) and biliary tract stone formation. The evaluation of biliary strictures in patients with PSC is especially challenging, with imaging and endoscopic methods having only modest sensitivity for the diagnosis of cholangiocarcinoma, and treatment of biliary strictures poses a similarly significant clinical challenge. In recent years, peroral cholangioscopy has evolved technologically and increased in popularity as an endoscopic tool that can provide direct intraductal visualisation and facilitate therapeutic manipulation of the biliary tract. However, the indications for and effectiveness of its use in patients with PSC remain uncertain, with only a few studies performed on this small but important subset of patients. In this review, the authors discuss the available data regarding the use of peroral cholangioscopy in patients with PSC, with a focus on its use in the evaluation and management of biliary strictures and stones.

Targeting Raised von Willebrand Factor Levels in Liver Diseases: Opening Up Newer Therapeutic Avenues

Raised levels of the blood coagulation protein von Willebrand factor (VWF) are now recognised to be important in patients with liver disease. The markedly raised plasma VWF levels in patients with acute liver failure and acute-on-chronic liver failure may contribute to the pathogenesis of liver failure, and of multi-organ failure, by impeding microcirculatory perfusion in the liver and the other affected vital organs. In this review, the authors present a brief introduction to VWF biology, discuss the ability of raised plasma VWF levels to accurately predict survival in different syndromes of liver diseases, speculate why plasma VWF levels are raised in liver failure syndromes, and examine the therapeutic potential of VWF-lowering therapies in these scenarios.