scholarly journals Morphological and histological structure characteristics of the gastrointestinal tract in Sinogastromyzon szechuanensis

2020 ◽  
Keyword(s):  
Gastrointestinal Tract ◽  
Histological Structure ◽  
Structure Characteristics

Histology of the gastrointestinal tract of the northern brown bandicoot, Isoodon macrourus (Marsupialia:Peramelidae)

2011 ◽  
Vol 33 (1) ◽  
pp. 44 ◽  
Author(s):  
Patricia J. O'Hara ◽  
Peter J. Murray ◽  
Athol V. Klieve
Keyword(s):  
Small Intestine ◽  
Gastrointestinal Tract ◽  
Histological Structure ◽  
Total Length

Published information on the histology of the gastrointestinal tract of peramelids is limited, with previous research only examining portions of the tract. We examined the histological structure of the gastrointestinal tract of eight adult I. macrourus from stomach to colon. The organisation of the tissue layers of the gastrointestinal tract was comparable to other mammals. In contrast to previous research, the long villi in the small intestine, which accounts for half of the total length of the gastrointestinal tract in an adult I. macrourus, were folded in a zig-zag formation. The purpose of this morphological strategy is unclear.

scholarly journals CLINICAL AND MORPHOLOGICAL FEATURES OF GASTROINTESTINAL LEIOMYOMAS WHICH ARE COMPLICATED BY BLEEDING

2021 ◽  
Vol 4 (18) ◽  
pp. 32-37
Author(s):  
V.O. Shaprynsky ◽  
O.A. Kaminsky ◽  
Y.V. Babii
Keyword(s):  
Gastrointestinal Tract ◽  
Histopathological Examination ◽  
Smooth Muscle Actin ◽  
Upper Gastrointestinal Tract ◽  
Proliferation Index ◽  
Histological Structure ◽  
Study Group ◽  
Ki 67 ◽  
Immunohistochemical Marker ◽  
Upper Gastrointestinal

Aim: Investigation of the morphological structure of gastrointestinal leiomyomas which complicated by bleeding, and also reveal the reasons of such complications. Material and methods: There are 36 patients in the study group. All patients were hospitalized in Vinnitsa Regional Clinical Hospital during 2010-2021years with the features of acute gastrointestinal bleeding from the upper gastrointestinal tract. The verification of the tumor was carried out using histopathological and immunohistochemical studies in the postoperative period. According to the results of these studies, all patients were diagnosed with leiomyoma. Results: Among all patients hospitalized with an acute GI bleeding during 2010 - 2021, GI leiomyomas were diagnosed in 0.41%. Men accounted for 56.4%, women - 43.6%. Most of all there were patients aged 50-70 years. The size of the smallest tumor witch removed was 2.5 × 2 cm, the largest - 10 × 8 cm. In our study, leiomyomas that were complicated by bleeding were most often localized in the stomach (88.9%) and duodenum (8.3%), and only in one case (2.8%) in the esophagus. Most of the complicated leiomyomas became leiomyomas of such pathomorphological types as cellular, epitheloid and weird leiomyomas. Their histological structure has its own characteristics. The manifestations of neoangiogenesis and destruction of the blood vessels are clearly visible. There is a thin, it is extensions, all vessels are lacunars and sinusoidal. Also it has sings of angiomatosis. Immunohistochemical analysis of all leiomyomas in the study group showed a positive reaction to smooth muscle actin and desmin, and was negative for CD117 and CD34. In all complicated leiomyomas, the intensity of expression of the immunohistochemical marker of endothelial vessels CD31, which is responsible for the level of vascularization, was high, which confirms the results obtained in histopathological examination. The proliferation index of all complicated leiomyomas was below 5%, which confirms the benign nature of these tumors. But the mean expression level of Ki-67 was statistically higher for complicated leiomyomas. Conclusions: During the histopathological examination it was found that leiomyomas of the proliferative pathomorphological subspecies, which include cellular, epitheloid, and weird leiomyomas, were most often complicated by bleeding. Factors that affect the growth rate of gastrointestinal leiomyomas include the level of proliferative activity of the tumor and the level of its vascularization. Determination of the level of tumor proliferation is performed using the immunohistochemical marker Ki-67, and to determine the level of vascularization is responsible for the immunohistochemical marker CD31. Upper gastrointestinal leiomyomas, which complicated by bleeding were characterized by high levels of Ki-67 and CD31 expression. The obtained research data can be used in the selection of diagnostic and treatment management for patients with leiomyomas of the upper gastrointestinal tract.

scholarly journals First case of intestinal leiomyosarcoma in a bearded dragon: Ultrasonographic findings

2016 ◽  
Vol 72 (5) ◽  
pp. 303-306
Author(s):  
Anna Łojszczyk-Szczepaniak ◽  
Anna Śmiech ◽  
Nadia Chlebicka ◽  
Klaudiusz O. Szczepaniak ◽  
Paweł Klimiuk
Keyword(s):  
Gastrointestinal Tract ◽  
Ultrasound Examination ◽  
Smooth Muscles ◽  
The Body ◽  
Focal Lesion ◽  
Histological Structure ◽  
Coelomic Cavity ◽  
Bearded Dragon ◽  
Pogona Vitticeps ◽  
Small Intestinal

The paper presents a case of leiomyosarcoma of the gastrointestinal tract in a bearded dragon (Pogona vitticeps) with an ultrasound and histopathological description of pathological changes. According to our knowledge, leiomyosarcoma of the gastrointestinal tract and its ultrasound features have not been reported in lizards yet. A male bearded dragon (Pogona vitticeps), aged 4 years, was referred for radiological and ultrasound examination with a history of apathy and loss of appetite. A preliminary diagnosis of an advanced neoplasia process in the caudal coelomic cavity was established by diagnostic imaging methods. The owner decided to euthanize the animal and agreed to a post-mortem examination. After euthanasia, a histopathological examination was performed. In a radiological examination, an irregularly marginated radiopacity measuring 5.8 x 4.0 cm was visible in the central part of the coelom. Serosal margin details in the coelomic cavity were decreased, and differentiation of coelomic organs was impossible. An ultrasound examination confirmed a large amount of free echogenic fluid in the coelomic cavity. The liver had increased echogenicity, and a hypoechoic focal lesion was found in the right lobe. Mixed echogenicity masses were visible in the caudal coelom adjacent to the small intestinal loops. In one of the adjacent intestinal loops, a focal thickening of the small intestinal wall was observed with loss of the normal layered architecture. The mass had complex and mostly low echogenicity with a cystic lesion present in the centre. Necropsy confirmed the presence of proliferative lesions in the body cavity, originating from the intestine and infiltrating the mesentery and the lumbar spine area as well as the gonads located at this site. On the basis of the histological structure of the intestinal tumour, the neoplastic proliferation was classified, according to the WHO classification, to a group of malignant tumours with characteristics of leiomyosarcoma and arising from the smooth muscles. The ultrasonographic features of gastrointestinal leiomyosarcoma in that lizard corresponded to features found in dogs, in which such tumours occur as eccentric, poorly echogenic masses with anechoic cavities in large changes. Leiomyosarcoma in reptiles can be locally invasive as well. Metastatic foci are also possible, especially in the liver.

scholarly journals Morphological study of the gastrointestinal tract of Larimichthys crocea (Acanthopterygii: Perciformes)

2018 ◽  
Vol 35 ◽  
pp. 1-9 ◽  
Author(s):  
Hameeda Kalhoro ◽  
Shengli Tong ◽  
Lei Wang ◽  
Ying Hua ◽  
Josie Ancella Volatiana ◽  
...  
Keyword(s):  
Gastrointestinal Tract ◽  
Morphological Study ◽  
Digestive System ◽  
Cell Types ◽  
Goblet Cells ◽  
Histological Structure ◽  
Larimichthys Crocea ◽  
Connective Tissues ◽  
Pyloric Caeca ◽  
Folded Structure

The present study aimed to investigate the macroscopic and histological structure of the gastrointestinal tract (GIT) of Larimichthyscrocea (Richardson, 1846). It consists of esophagus, stomach regions, pyloric caeca, intestinal regions, and rectum. Sixteen tubular light yellowish pyloric caeca of similar sizes were observed in all individuals. The digestive wall consists of mucosa, submucosa, muscularis, and adventitia. No major differences appeared in the structure of the tunica, epithelial cell types, connective tissues and musculature glands of L.crocea GIT. The mucosal epithelia in the oesophagus has longitudinal branched folds with frontward and hindmost zones. The gastric tunica mucosa has a characteristic folded structure and can be divided into three regions. The intestinal tunica mucosa is characterized by villi structures and numerous mucus-secreting cells. Mucus-secreting goblet cells were strongly positive to AB at pH 2.5 in the oesophagus (excluding gastro-oesophageal junction) and intestine mucosal regions, which indicates an abundance of carboxylate mucins. The surface epithelia of the gastric mucosa is PAS-positive and AB-negative. SEM examination revealed that cells in the epithelium of the esophagus have an unbroken apical layer and goblet cells. The intestinal coefficient (IC) of L.crocea was 0.80 ± 0.21, consistent with a carnivorous or omnivorous habit. Our study adds the knowledge of the digestive system of L.crocea and might be useful in the management of L.crocea stocks.

Habitat Association of Klebsiella Species

1985 ◽  
Vol 6 (2) ◽  
pp. 52-58 ◽  
Author(s):  
Susan T. Bagley
Keyword(s):  
Drinking Water ◽  
Gastrointestinal Tract ◽  
Surface Waters ◽  
Industrial Effluents ◽  
Opportunistic Pathogen ◽  
Habitat Associations ◽  
Habitat Association ◽  
Klebsiella Species ◽  
Almost All ◽  
Polluted Waters

AbstractThe genus Klebsiella is seemingly ubiquitous in terms of its habitat associations. Klebsiella is a common opportunistic pathogen for humans and other animals, as well as being resident or transient flora (particularly in the gastrointestinal tract). Other habitats include sewage, drinking water, soils, surface waters, industrial effluents, and vegetation. Until recently, almost all these Klebsiella have been identified as one species, ie, K. pneumoniae. However, phenotypic and genotypic studies have shown that “K. pneumoniae” actually consists of at least four species, all with distinct characteristics and habitats. General habitat associations of Klebsiella species are as follows: K. pneumoniae—humans, animals, sewage, and polluted waters and soils; K. oxytoca—frequent association with most habitats; K. terrigena— unpolluted surface waters and soils, drinking water, and vegetation; K. planticola—sewage, polluted surface waters, soils, and vegetation; and K. ozaenae/K. rhinoscleromatis—infrequently detected (primarily with humans).

Keratinocyte growth factor binds to collagens of the gastrointestinal tract: Identification of the collagen binding structure

2001 ◽  
Vol 120 (5) ◽  
pp. A695-A695
Author(s):  
M RUEHL ◽  
I SCHOENFELDER ◽  
R FARNDALE ◽  
G KNIGHT ◽  
R SOMASUNDARAM ◽  
...  
Keyword(s):  
Gastrointestinal Tract ◽  
Growth Factor ◽  
Keratinocyte Growth Factor ◽  
Collagen Binding ◽  
Binding Structure

Culture Studies of the Gastrointestinal Tract with a Newly Devised Capsule

1963 ◽  
Vol 45 (5) ◽  
pp. 625-632 ◽  
Author(s):  
Margot Shiner ◽  
T.E. Waters ◽  
J.D. Allan Gray ◽  
R.A. Lambert
Keyword(s):  
Gastrointestinal Tract ◽  
Culture Studies

Evaluation of Oral Glutamate in Ammonemia Due to Blood in the Gastrointestinal Tract

1960 ◽  
Vol 39 (2) ◽  
pp. 191-195 ◽  
Author(s):  
Alice N. Bessman ◽  
George S. Mirick ◽  
Robert Hawkins
Keyword(s):  
Gastrointestinal Tract
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