Summary

Gastrointestinal disease is a very common and frequently occurring disease, with a wide range of types and a total incidence of about 20% of the population. The cause of gastrointestinal disease is the imbalance between the protective mechanism and the injury mechanism of the human body. While traditional medicine kills harmful bacteria in the stomach, it also kills the beneficial bacteria necessary for the stomach. Although the symptoms are alleviated and inflammation is eliminated, the reduction of beneficial bacteria reduces the gastrointestinal immunity. Once the drug is stopped, it is easy to re-infect. There are many reasons for stomach problems, including genetics, environment, diet, drugs, bacterial infections, etc., as well as smoking and excessive alcohol consumption. This collection of entries aims to collect various items related to the topic of gastrointestinal diseases, such as clinical care, case cases, disease research, etc., to help people increase their knowledge and understanding of this common disease

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Entries
Topic Review
Cytomegalovirus Diseases of the Gastrointestinal Tract
Cytomegalovirus (CMV), a double-stranded DNA virus, is an important member of the Herpesviridae family. CMV infection can manifest as asymptomatic, constitutional symptoms or tissue-invasive diseases. The gastrointestinal (GI) tract is one of the most commonly involved systems and associated with 30% of tissue-invasive diseases among immunocompetent patients. CMV GI disease is defined on the basis of upper and/or lower GI symptoms, macroscopic mucosal lesions, and CMV documented in tissue by histopathology, virus isolation, rapid culture, immunohistochemistry (IHC), or DNA hybridization techniques. However, IHC staining has a higher sensitivity and specificity than routine HE staining.
  • 438
  • 01 Mar 2022
Topic Review
Small Bowel Adenocarcinoma
Small bowel adenocarcinoma (SBA) is a rare malignancy, with a rising incidence in recent decades, and accounts for roughly 40% of all cancers of the small bowel. The majority of SBAs arise in the duodenum and are associated with a dismal prognosis. Surgery remains the mainstay of treatment for localized disease, while systemic treatments parallel those used in colorectal cancer (CRC), both in the adjuvant and palliative setting. In fact, owing to the lack of prospective data supporting its optimal management, SBA has historically been treated in the same way as CRC.
  • 593
  • 23 Feb 2022
Topic Review
Nutrition in Patients with Inflammatory Bowel Diseases
Inflammatory bowel diseases (IBD) are a heterogeneous group of inflammatory disorders of the gastrointestinal (GI) tract, with a chronic or recurrent clinical course, characterized by phases of exacerbation and remission. The clinical presentation has a heterogeneous phenotypic spectrum, characterized by gastrointestinal and extraintestinal manifestations, with atypical or non-specific symptoms. Crohn’s disease (CD) and ulcerative colitis (UC) are the most typical conditions in this spectrum, and they differ in anatomical location and type of lesions. The etiology is multifactorial, and to date, the prevailing hypothesis is that an abnormal mucosal immunological response is triggered against ubiquitous antigens, such as the resident bacterial flora, in genetically predisposed individuals. However, since the 1970s, in the pathogenesis of IBD diseases, there has been an increase in the number of diagnoses, especially in industrialized countries, thus highlighting the potential role of environmental factors, such as lifestyle and dietary habits, the interaction between diet and the susceptibility to gene variants, abnormal gut microbiota and altered immune response.
  • 505
  • 23 Feb 2022
Topic Review
Organ-Preserving Radiation Therapy in Gastric Marginal Zone Lymphoma
Gastric marginal zone lymphoma (MZL) of the stomach is a rare cancer type, often primarily treated with oral proton pump inhibitors, especially in Helicobacter pylori (Hp)-positive cases. However, the prevalence of Hp-unrelated gastric MZL has increased over the last two decades and 70-80% of Hp-negative gastric MZL are antibiotic-unresponsive. Radiation treatment can provide excellent local control in localized antibiotic-refractory gastric MZL.
  • 502
  • 21 Feb 2022
Topic Review
Environmental and Lifestyle Risk Factors in Gallbladder Carcinogenesis
Gallbladder cancer (GBC) is an aggressive neoplasm that in an early stage is generally asymptomatic and, in most cases, is diagnosed in advanced stages with a very low life expectancy because there is no curative treatment. Therefore, understanding the early carcinogenic mechanisms of this pathology is crucial to proposing preventive strategies for this cancer. The main risk factor is the presence of gallstones, which are associated with some environmental factors such as a sedentary lifestyle and a high-fat diet. Other risk factors such as autoimmune disorders and bacterial, parasitic and fungal infections have also been described. All these factors can generate a long-term inflammatory state characterized by the persistent activation of the immune system, the frequent release of pro-inflammatory cytokines, and the constant production of reactive oxygen species that result in a chronic damage/repair cycle, subsequently inducing the loss of the normal architecture of the gallbladder mucosa that leads to the development of GBC.
  • 1.4K
  • 18 Feb 2022
Topic Review
Isolation, Characterization, and Molecular Detection of Porcine Sapelovirus
Porcine sapelovirus (PSV) is an important emerging pathogen associated with a wide variety of diseases in swine, including acute diarrhoea, respiratory distress, skin lesions, severe neurological disorders, and reproductive failure. 
  • 594
  • 18 Feb 2022
Topic Review
Intestinal Barrier Dysfunction in Gut Dysbiosis and Diseases
The intestinal mucosal barrier, also referred to as intestinal barrier, is widely recognized as a critical player in gut homeostasis maintenance as it ensures the complex crosstalk between gut microbes (both commensals and pathogens) and the host immune system. Highly specialized epithelial cells constantly cope with several protective and harmful agents to maintain the multiple physiological functions of the barrier as well as its integrity. However, both genetic defects and environmental factors can break such equilibrium, thus promoting gut dysbiosis, dysregulated immune-inflammatory responses, and even the development of chronic pathological conditions.
  • 744
  • 17 Feb 2022
Topic Review
Feeding Problems in Patients with Noonan Syndrome
Noonan syndrome (NS) belongs to the group of Noonan syndrome spectrum disorders (NSSD), which is a group of phenotypically related conditions. Feeding problems are often present not only in infancy but also in childhood, and even beyond that period. More than 50% of infants with NS develop feeding problems, and up to half of these infants will be tube-dependent for some time. Although, in general, there is a major improvement between the age of 1 and 2 years, with only a minority still having feeding problems after the age of 2 years, as long as the feeding problems continue, the impact on the quality of life of both NS infants and their caregivers may be significant. Feeding problems in general improve faster in children with a pathogenic PTPN11 or SOS1 variant. The mechanism of the feeding problems is complex, and may be due to medical causes (gastroesophageal reflux disease and delayed gastric emptying, cardiac disease and infections), feeding-skill dysfunction, nutritional dysfunction with increased energy demand, or primary or secondary psychosocial dysfunction. Many of the underlying mechanisms are still unknown. The treatment of the feeding problems may be a medical challenge, especially when the feeding problems are accompanied by feeding-skill dysfunction and psychosocial dysfunction. 
  • 940
  • 17 Feb 2022
Topic Review
Omics Technologies and Colorectal Cancer
Colorectal cancer (CRC) is one of the most frequent cancers worldwide. Early detection of CRC is crucial, as it greatly improves the survival of patients. Currently, the CRC screening programs consist of a stool test to detect the presence of blood in stool and a subsequent colonoscopy to confirm the diagnosis. However, CRC screening can be further improved with the use of new biomarkers. Omics technologies, that is, techniques that generate a vast amount of data, can help to establish these markers. 
  • 400
  • 17 Feb 2022
Topic Review
NAFLD in Lean and Non-Obese Individuals
Non-alcoholic fatty liver disease (NAFLD), which approximately affects a quarter of the world’s population, has become a major public health concern. Although usually associated with excess body weight, it may also affect normal-weight individuals, a condition termed as lean/non-obese NAFLD. The prevalence of lean/non-obese NAFLD is around 20% within the NAFLD population, and 5% within the general population. Current treatment of lean NAFLD is aimed at improving overall fitness and decreasing visceral adiposity, with weight loss strategies being the cornerstone of treatment.
  • 520
  • 16 Feb 2022
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