[Difficulties in diagnosing intestinal T-cell lymphoma. Case report].

The article describes a rare diagnosis of monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL), due to its veiled by a number of so-called "masks" of enteropathies. A detailed analysis of all clinical, morphological and immunohistochemical data made it possible to establish the correct diagnosis. The revealed pathology is extremely rare in practice, even among specialists in hematology. The article demonstrates the main stages of both a complex diagnosis and an attempt at therapy for this aggressive form of intestinal lymphoma.

[Liver and COVID-19: possible mechanisms of damage].

The global epidemic of a new coronavirus infection caused by SARS-CoV-2 is a major threat to human health. In the clinical picture, along with acute respiratory distress syndrome, liver lesions are also noted. The following mechanisms are currently being considered: direct damaging effects of SARS-CoV-2, immuno-mediated inflammation, hypoxia, drug exposure, and reactivation of pre-existing liver disease. We studied 150 patients with COVID-pneumonia who are under inpatient treatment at the University Clinical Hospital No. 1 of Sechenov First Moscow State Medical University. Of these, the presence of SARS-CoV-2 RNA was confirmed by polymerase chain reaction in 84 (56.0%) patients. In 55 (36.7%) patients, an increase in serum aminotransferases was registered, mainly alanine aminotransferase max. up to 572 U/L and aspartate aminotransferase up to a max. of 232 U/L. The long-term consequences are unknown and require monitoring of these patients.

[Esophageal disorders in patients with irritable bowel syndrome].

AIM: To study the whole range of esophageal disorders in patients with irritable bowel syndrome (IBS) using high-tech methods. MATERIALS AND METHODS: 102 IBS patients (47 males, mean age 40.8, diagnosis of IBS was established according to Rome III criteria) with esophageal symptoms (heartburn, belching, globus sensation and noncardiac chest pain) were examined in gastroenterology department. All patients underwent endoscopy, with biopsies if required, X-ray examination of upper gastrointestinal tract; 24-hour pH-impedance monitoring;13C-urea breath test. Evaluation of esophageal symptoms was carried out on the basis of Rome IV criteria. RESULTS: 21 (20.6%) individuals had esophagitis (ERD). According to 24-hour pH-monitoring data, 7 of them had overlap between GERD and functional esophageal disorders (FED). 27 (26.5%) individuals had nonerosive reflux disease (NERD). In 54 (52.9%) individuals endoscopy and pH-impedance monitoring data did not differ from normal, suggesting this group as group of patients with FED. There was no significant difference for age, sex and IBS subtypes in GERD, NERD and FED groups. CONCLUSION: Comorbid esophageal disorders in patients with IBS are different and represented by organic diseases, FED and overlap between them. Methods such as 24-h pH-impedance measurement and esophageal manometry should be used to assess comorbid esophageal disorders in IBS patients.

[Circulating Neuregulin-1 and Chronic Heart Failure with Preserved Ejection].

Chronic heart failure (CHF) with preserved ejection fraction (CHFpEF) is an unsolved, socially relevant challenge since it is associated with a high level of morbidity and mortality. Early markers for this pathology are unavailable, and therapeutic approaches are undeveloped. This necessitates extensive studying the mechanisms of CHFpEF to identify therapeutic targets. According to current notions, systemic inflammation and endothelial dysfunction play an important role in the pathogenesis of CHFpEF. These processes induce the development of myocardial fibrosis and impairment of cardiomyocyte relaxation, thereby resulting in diastolic dysfunction and increased left ventricular (LV) filling pressure. Neuregulin-1 (NRG-1) is a paracrine growth factor and a natural agonist of ErbB receptor family synthesized in the endothelium of coronary microvessels. The NRG-1 / ErbB4 system of the heart is activated at early stages of CHFpEF to enhance the cardiomyocyte resistance to oxidative stress. Preclinical and clinical (phases II and III) studies have shown that the recombinant NRG-1 therapy results in improvement of myocardial contractility and in LV reverse remodeling. Results of recent studies suggest possible anti-inflammatory and antifibrotic effects of NRG-1, which warrants studying the activity of this system in patients with CHFpEF.

[Case report of a combination of periodic disease and irritable bowel syndrome].

The article reports a case of atypical picture of a combination of periodic disease and irritable bowel syndrome in a 52 year old patient.

[Emotional and personality features of patients with irritable bowel syndrome and bowel inflammatory diseases].

Objective: To conduct a comparative analysis of the emotional and personality characteristics of patients with irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD) in remission with IBS-like symptoms. Patients and methods: This study carried out based at a specialized gastroenterology clinic in the period from 2010 to 2015 included 125 patients with IBS (IBS-D - 46, IBS-C - 20, IBS-M - 59) and 37 patients with IBD in remission: Crohn's disease (CD) - 11 and ulcerative colitis (UC) -26 patients. The levels of depression (Beck questionnaire), urgent and personal anxiety (Spielberger questionnaire), the degree of alexithymia (Toronto scale) as well as the severity of psychopathology and behavioral symptoms (PBS) were estimated. Results: Patients with IBS were not significantly different from those with IBD in remission with IBS-like symptoms in terms of depression, actual anxiety, alexithymia and PBS. Only the index of personal anxiety was significantly higher in the group of patients with IBS compared with IBD in remission with IBS-like symptoms (p = 0.0376). Men with IBS exhibited significantly higher actual anxiety than men with IBD (p = 0.04). Maximum severity of depression, anxiety and alexithymia was documented in the locking version of IBS (IBS-C) in comparison with other variants of IBS (p <0.05). Patients with CD in remission are characterized by higher rates of depression and alexithymia compared to UC (p <0.05). Behavioural disorders are most pronounced in the diarrheal variant of IBS and CD. Conclusion: A higher personal anxiety was observed in patients with IBS compared to those in remission of IBD with IBS-like symptoms although other parameters were not significantly different. Patients with IBS-C were characterized by more pronounced manifestations of emotional and personality disorders. More severe emotional and behavioral disorders distinguish CD from UC.

[Functional disorders: pathogenesis and systematic of clinical presentation]. / Funktsional'nye rasstroistva: sistematika klinicheskikh proiavlenii i patogenez.

Functional disorders hold a prominent place in the clinical practice of physicians of different specialties. The difficulties in the diagnosis of functional disorders need expensive examinations, and standard treatment is, as a rule, is not effective. Currently, the pathogenesis of these disorders is considered in the frames of the biopsychosocial model. In this literature review, the authors present modern concepts of terminology, classification, main features and general trends of the course of functional disorders. Special attention is drawn to comorbidity, a role of psychogenic factors and cerebral mechanisms of the pathogenesis including cognitive aspects.

Application of power functions to chromatographic data for the enhancement of signal to noise ratios and separation resolution.

Chromatographic detection responses are recorded digitally. A peak is represented ideally by a Guassian distribution. Raising a Guassian distribution to the power 'n' increases the height of the peak to that power, but decreases the standard deviation by radicaln. Hence there is an increasing disparity in detection responses as the signal moves from low level noise, with a corresponding decrease in peak width. This increases the S/N ratio and increases peak to peak resolution. The ramifications of these factors are that poor resolution in complex chromatographic data can be improved, and low signal responses embedded at near noise levels can be enhanced. The application of this data treatment process is potentially very useful in 2D-HPLC where sample dilution occurs between dimension, reducing signal response, and in the application of post-reaction detection methods, where band broadening is increased by virtue of reaction coils. In this work power functions applied to chromatographic data are discussed in the context of (a) complex separation problems, (b) 2D-HPLC separations, and (c) post-column reaction detectors.

[Debatable aspects of pathogenesis and diagnostics of irritable bowel syndrome (IBS) and inflammatory bowel diseases with IBS-like diseases].

Aim of review: To analyze current publications devoted to controversial issues of pathogenesis, diagnosis and differential diagnosis of irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD) in remission with IBS-like symptoms. Key points: There are three main hypotheses discussed in the literature: 1) IBS as a prodrome, pre-stage of the IBD; 2) IBS and IBD are different variants of inflammatory disorder which is common to both diseases; 3) The onset of IBS-like symptoms in IBD patients in remission. Conclusion: It is shown that modern literature data on this issue is contradictory and ambiguous.