Publications by authors named "Jan Kral"

Background: Endoscopic retrograde cholangiopancreatography (ERCP) still has a relatively high complication rate, underscoring the importance of high-quality training. Despite existing guidelines, real-world data on training conditions remain limited. This pan-European survey aims to systematically explore the perceptions surrounding ERCP training.

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Obesity has become a worldwide problem with a growing incidence, posing a risk to health, especially for cardiovascular disease, diabetes, certain types of cancer, depres-sive syndrome, and others. The methods of obesity treatment are still expanding, in addition to diet and exercise measures, pharmacological, endoscopic and surgical treatment is possible. One of the commonly performed bariatric surgical procedures is the Roux-en-Y gastric bypass, which combines restrictive and malabsorptive effects.

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Obesity is a global problem with a rising prevalence, which has serious implications not only for individuals' health but also for society as a whole. The increased incidence of overweight and obesity leads to higher healthcare costs and limits the employment opportunities of individuals, affecting their quality of life. The treatment of obesity encompasses various approaches, including diet, exercise, pharmacotherapy, and surgical bariatric procedures.

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This article discusses special additive technologies, with a particular focus on the innovative binder jetting technology used to create three-dimensional objects. The theoretical part of this article defines the production process-its shortcomings and benefits. Also, the article describes process parameters and individual steps that must be optimally set for the desired result.

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Artificial Intelligence (AI) has evolved significantly over the past decades, from its early concepts in the 1950s to the present era of deep learning and natural language processing. Advanced large language models (LLMs), such as Chatbot Generative Pre-Trained Transformer (ChatGPT) is trained to generate human-like text responses. This technology has the potential to revolutionize various aspects of gastroenterology, including diagnosis, treatment, education, and decision-making support.

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Article Synopsis
  • Monoallelic germline pathogenic variants in certain Fanconi anemia genes are known to increase breast and ovarian cancer risk, but the effects of variants in FANCG/XRCC9 remain unclear.
  • Researchers found that the frequency of truncating variants in FANCG did not significantly differ between breast cancer, ovarian cancer patients, and controls.
  • The study concludes that heterozygous germline FANCG variants are unlikely to play a role in developing breast or ovarian cancer.
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Background: The polygenic risk score (PRS) allows the quantification of the polygenic effect of many low-penetrance alleles on the risk of breast cancer (BC). This study aimed to evaluate the performance of two sets comprising 77 or 313 low-penetrance loci (PRS77 and PRS313) in patients with BC in the Czech population.

Methods: In a retrospective case-control study, variants were genotyped from both the PRS77 and PRS313 sets in 1329 patients with BC and 1324 noncancer controls, all women without germline pathogenic variants in BC predisposition genes.

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Background: Adherence to Helicobacter pylori (H. pylori) eradication treatment is a cornerstone for achieving adequate treatment efficacy.

Objective: To determine which factors influence compliance with treatment.

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Purpose: Obesity and its related severe comorbidities are increasing rapidly. The duodenal-jejunal bypass is an endoscopically implanted device (mimicking the Roux-en-Y gastric bypass) developed to support weight reduction and improve type 2 diabetes control.

Materials And Methods: Retrospective data analysis of consecutive patients undergoing duodenal-jejunal bypass (EndoBarrier®, DJB) implantation between 2013 and 2017 was performed to evaluate safety as well as short- and long-term efficacy.

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  • The study aimed to investigate the presence and risk factors of neurological extraintestinal manifestations, particularly peripheral neuropathy, in patients with severe Crohn's disease undergoing anti-TNFα therapy.
  • Clinical examinations and lab tests were conducted on 30 neurologically asymptomatic patients, revealing that 36.7% had pathological results in sensor-motor function tests, with significant associations to age, disease duration, and BMI.
  • The presence of cardiovascular autonomic neuropathy was found in 56.7% of patients, but no significant risk factors were identified, highlighting the need for further research on the neuropathic effects of Crohn's disease.
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In the past decade, Long-Range Wire-Area Network (LoRaWAN) has emerged as one of the most widely adopted Low Power Wide Area Network (LPWAN) standards. Significant efforts have been devoted to optimizing the operation of this network. However, research in this domain heavily relies on simulations and demands high-quality real-world traffic data.

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Introduction: The development of colorectal cancer (CRC) is a multistep process accompanied by the accumulation of mutations that start from specific precancerous lesion - colorectal adenomas (CA). CRC incidence and mortality can be reduced by the early identification of these neoplasm. Colonoscopy is the most widely used screening method for CRC identification.

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Endometrial cancer (EC) is the most common gynecological malignancy in developed countries. The present study aimed to determine the frequency of germline pathogenic variants (PV) in patients with EC. In this multicenter retrospective cohort study, germline genetic testing (GGT) was performed in 527 patients with EC using a next generation sequencing panel targeting 226 genes, including 5 Lynch syndrome (LS) and 14 hereditary breast and ovarian cancer (HBOC) predisposition genes, and 207 candidate predisposition genes.

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Obesity is a chronic, relapsing, degenerative, multifactorial disease that is associated with many co-morbidities. The global increasing burden of obesity has led to calls for an urgent need for additional treatment options. Given the rapid expansion of bariatric endoscopy and bariatric surgery across Europe, the European Society of Gastrointestinal Endoscopy (ESGE) has recognized the need to formalize and enhance training in bariatric endoscopy and the endoscopic treatment of bariatric surgical adverse events.

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Hepatocellular carcinoma (HCC) mainly stems from liver cirrhosis and its genetic predisposition is believed to be rare. However, two recent studies describe pathogenic/likely pathogenic germline variants (PV) in cancer-predisposition genes (CPG). As the risk of de novo tumors might be increased in PV carriers, especially in immunosuppressed patients after a liver transplantation, we analyzed the prevalence of germline CPG variants in HCC patients considered for liver transplantation.

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Background: Inflammatory bowel disease (IBD) care and education might differ around Europe. Therefore, we conducted this European Variation In IBD PracticE suRvey (VIPER) to investigate potential differences between countries.

Methods: This trainee-initiated survey, run through SurveyMonkey®, consisted of 47 questions inquiring basic demographics, IBD training, and clinical care.

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A narrative review of the literature was conducted to determine if the administration of methylene blue (MB) in humans has potential risks. Studies were identified from MEDLINE, Web of Science, Scopus, and Cochrane. MB is a diagnostic substance used during some diagnostic procedures and also a part of the treatment of several diseases including methemoglobinemia, vasoplegic syndrome, fosfamide-induced encephalopathy, and cyanide intoxication, and the detection of leaks or position of parathyroid corpuscles during surgery.

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Article Synopsis
  • Colorectal adenomas, which are abnormal tissue growths from the intestinal lining, are known precursors to colorectal cancer (CRC), and this study focuses on the chromosomal changes in these adenomas.
  • Using advanced genetic techniques on samples from 16 patients, the research found that different adenomas displayed varying levels of chromosomal instability (CIN), suggesting that CIN occurs early in their development.
  • The study categorized patients into four groups based on distinct chromosomal patterns, identifying specific gene losses and gains, including the amplification of the long non-coding RNA MALAT1, which is linked to cancer progression.
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