نتایج جستجو برای: mucosal associated lymph tissue malt
تعداد نتایج: 2315116 فیلتر نتایج به سال:
The differential diagnosis between Helicobacter pylori (H pylori-associated chronic gastritis and low-grade B-cell gastric lymphoma of mucosa-associated lymphoid tissue (MALT) and the assessment of endoscopic biopsy specimens after treatment of lymphoma can be problematic. Although immunocytochemistry can be used to identify clonal B-cell populations, which are characteristic of MALT lymphoma, ...
Activation of mucosal immunity and novel prophylactic and therapeutic strategy in combating COVID-19
Coronavirus disease 2019 (COVID-19) emerges as an expeditiously growing pandemic, in the human population caused by highly transmissible RNA virus severe acute respiratory syndrome of coronavirus 2 (SARS-CoV-2). Prognosis SARS-CoV-2 infection predominantly occurs at angiotensin-converting enzyme receptor and transmembrane protease serine type positive (ACE2 + TMPRSS2)+ epithelial cells mucosal ...
Low grade B cell mucosa associated lymphoid tissue (MALT) lymphoma of the stomach is usually an indolent tumour that remains localised for a long time before dissemination occurs. MALT appears in the stomach in response to infection by Helicobacter pylori, which is present in 80-90% of cases. The pathogenesis of the evolution from chronic gastritis to malignant lymphoma has not yet been fully e...
Mucosa-associated lymphoid tissue (MALT) lymphomas are a distinct clinico-pathologic entity mainly associated with chromosomal translocations involving the MALT1 gene. Therefore, these chromosomal rearrangements have been traditionally used to identify tumor MALT lymphoma B-cells, and they have always been detected in differentiated tumoral B cells. However, the hematopoietic progenitor and ste...
BACKGROUND Hepatitis C virus (HCV) infection is frequently associated with B-cell non-Hodgkin's lymphomas. We investigated the prevalence of HCV infection in nongastric marginal zone lymphomas of mucosa-associated lymphoid tissue (MALT) in order to define the relationship between the viral infection and the presenting features, treatment, and outcome. METHODS We retrospectively studied 172 pa...
PURPOSE Mucosa-associated lymphoid tissue (MALT) lymphoma comprises 7% of all newly diagnosed non-Hodgkin's lymphomas and is therefore among the most common lymphoma entities. Monoclonal gammopathy due to production of a monoclonal immunoglobulin by lymphoma cells is a well-known phenomenon associated with various types of B-cell non-Hodgkin's lymphomas. The objective of the present study was t...
Bronchus-associated lymphoid tissue and the source of immunoglobulin-containing cells in the mucosa.
Bronchus-associated lymphoid tissue has major morphologic and functional similarities to Peyer's patches found in the gut. Both possess a lymphoepithelium with selective antigen sampling properties, both appear in the apparent absence of direct antigen stimulation, both contain a high percentage of cells bearing IgA sdurface immunoglobulin and both can repopulate the bronchial and gut lamina pr...
CT scans were performed in a supine and prone position with drug-induced hypotonia and water-filling of stomach with 500–700 ml., and intravenous administration of a non-ionic contrast agent. the prone position and drug-induced hypotonia allowed visualization of the whole gastric wall and prevented gas artifacts, commonly present during supine imaging. CT scans were analysed with respect to the...
20-30% of gastric mucosa-associated lymphoid tissue (MALT) lymphoma associated with Helicobacter pylori do not regress after antibiotic therapy. Regression can be assessed only by extended follow-up. To assess whether t(11;18, q21;q21), which results in a chimeric transcript between the AP12 and MLT genes, predicts lymphoma resistance to antibiotic therapy, we screened for the fusion transcript...
BACKGROUND "Helicobacter (H.) heilmannii" type 1 is the most prevalent gastric non-H. pylori Helicobacter species in humans suffering from gastric disease. It has been shown to be identical to H. suis, a bacterium which is mainly associated with pigs. To obtain better insights into the long-term pathogenesis of infections with this micro-organism, experimental infections were carried out in dif...
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