scholarly journals Die histologie en ultrastruktuur van die hepatopankreas van die bloukurper Oreochromis mossambicus

1990 ◽  
Vol 9 (1) ◽  
pp. 3-10
Author(s):  
M. M. Nel ◽  
J. H. Swanepoel ◽  
H. J. Geyer
Keyword(s):  
Secretory Granules ◽  
Central Vein ◽  
Connective Tissue Capsule ◽  
Close Proximity ◽  
Round Nucleus ◽  
Portal Veins ◽  
Rough Endoplasmic Reticula ◽  
Endoplasmic Reticula ◽  
Tissue Capsule ◽  
Prominent Nucleolus

The histology and ultrastructure of the hepatopancreas of the Mozambique tilapia O. mossambicus are described. The liver is surrounded by a thin connective tissue capsule. The hepatocyte arrangement shows as lobules, with the hepatocyte cords that radiate and anastomose from a central vein. Borders of individual liver lobules do not show clearly, as do the few triads found in the liver of O. mossambicus. Each hepatocyte contains a single round nucleus with a prominent nucleolus. The rough endoplasmic reticulum appears in two or more rows around the nuclei and in close proximity to the plastnalemma of the hepatocytes. The remaining cytoplasmic organelles are scattered throughout the hepatocyte cytoplasm. The exocrine pancreas cells are centred around the portal veins. The nuclei of these cells are spherical and hasally situated in the cubiform to cylindriform cells. Well developed rough endoplasmic reticula - vesicular, tubular and circular in appearance - as well as secretory granules, apically situated in the cells, are present.

scholarly journals Morphological and histological study of the liver in migratory starling bird (Sturnus vulgaris)

2017 ◽  
Vol 27 (5) ◽  
pp. 11
Author(s):  
Saddama Saed Faraj ◽  
Genan Adnan Al-Bairuty
Keyword(s):  
Abdominal Cavity ◽  
Liver Parenchyma ◽  
Sturnus Vulgaris ◽  
Histological Structure ◽  
Central Vein ◽  
Connective Tissue Capsule ◽  
Histochemical Observation ◽  
Pas Staining ◽  
Right Lobe ◽  
Tissue Capsule

The present work was aimed to form the baseline data of normal morphological and histological structure features of liver in migratory starling (Sturnus vulgaris). Anatomically, the starling liver bird was dark red -brown in colour and located in the cranial third of the abdominal cavity and consisted of undivided lobes (left and right). The liver right lobe was larger than the left. Histological examination revealed that the liver parenchyma was covered by a connective tissue capsule which appears to be thicker in the rim of liver lobes than other area in the liver lobe. Liver parenchyma was arranged in an unlimited hepatic lobules, which composed of polygonal hepatocytes organized as irregular, radial interconnecting cords or laminae of one or two cells thickness around a central vein and separated by blood sinusoids. In the boundary of each lobule showed a portal area which consists of a branch of hepatic artery; one or more branches of hepatic vein and one to four branches of the bile duct which lining by cuboidal cells that characterized by their empty non-staining cytoplasm. The histochemical observation by using PAS staining in the current study revealed that the glycogen granules arranged close to the central vein and in the rim of liver lobules.The present work was aimed to form the baseline data of normal morphological and histological structure features of liver in migratory starling (Sturnus vulgaris). Anatomically, the starling liver bird was dark red -brown in colour and located in the cranial third of the abdominal cavity and consisted of undivided lobes (left and right). The liver right lobe was larger than the left. Histological examination revealed that the liver parenchyma was covered by a connective tissue capsule which appears to be thicker in the rim of liver lobes than other area in the liver lobe. Liver parenchyma was arranged in an unlimited hepatic lobules, which composed of polygonal hepatocytes organized as irregular, radial interconnecting cords or laminae of one or two cells thickness around a central vein and separated by blood sinusoids. In the boundary of each lobule showed a portal area which consists of a branch of hepatic artery; one or more branches of hepatic vein and one to four branches of the bile duct which lining by cuboidal cells that characterized by their empty non-staining cytoplasm. The histochemical observation by using PAS staining in the current study revealed that the glycogen granules arranged close to the central vein and in the rim of liver lobules. Keywords: Birds, Liver morphology, liver histology.

SUBUNGUAL GLOMUS TUMOUR: THE ENIGMATIC CAUSE OF CHRONIC PAINFUL FINGER PULP - A CASE REPORT

2021 ◽  
pp. 11-12
Author(s):  
Mohit Naren Kondapalli ◽  
Kishore Babu EP ◽  
Affee Asma
Keyword(s):  
Soft Tissue ◽  
Subcutaneous Tissue ◽  
Soft Tissue Tumors ◽  
Glomus Tumour ◽  
Connective Tissue Capsule ◽  
Venous Shunt ◽  
Fourth Decade ◽  
Tissue Capsule ◽  
Dermis Layer ◽  
Glomus Body

Glomus tumour, also referred to as Barré–Masson syndrome is an enigmatic, rare, painful tumour that is that represents a proliferation of the normal capsular-neural glomus apparatus. These are rare hamartomas that arise from the traditional glomus apparatus, located in subcutaneous tissue These are benign soft tissue neoplasms presenting usually within the second to fourth decade of life, originating from the glomus body. It accounts for 1-5% of all upper limb soft tissue tumors . It's a component of the dermis layer of the [1] skin, involved in thermoregulation. It structurally consists of an arterio-venous shunt which is surrounded by a connective tissue capsule and is found in increased amounts in the ngers and toes.

scholarly journals Effects of High Hydrostatic Pressure Processing on the Number of Bacteria and Texture of Beef Liver

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Hirokazu Ogihara ◽  
Hodaka Suzuki ◽  
Masaki Michishita ◽  
Hitoshi Hatakeyama ◽  
Yumiko Okada
Keyword(s):  
Hydrostatic Pressure ◽  
High Hydrostatic Pressure ◽  
Ultrastructural Analysis ◽  
Lower Pressure ◽  
Mitochondrial Swelling ◽  
Beef Liver ◽  
High Hydrostatic Pressure Processing ◽  
Rough Endoplasmic Reticula ◽  
Endoplasmic Reticula ◽  
Number Of Bacteria

Providing beef liver for raw consumption was banned in Japan on July 1, 2012. To lift the ban, the establishment of effective countermeasures for safe raw consumption is necessary. In this study, we examined the effects of high hydrostatic pressure processing on raw beef liver. Beef liver samples subjected to 300 MPa of pressure or higher for 10 min at 25°C became firmer and showed a paler color and were considered unsuitable for raw consumption. More than 3.0 log reductions of bacteria were seen after treatments at 400 and 500 MPa, but the treatment with lower pressure did not show enough microcidal effects for safe consumption. Histological and ultrastructural analysis revealed that high hydrostatic pressure processing increased mitochondrial swelling and reduced rough endoplasmic reticula in hepatocytes, and such changes might be related to the observed changes of texture in the treated raw beef liver.

Fine structural observation on the oogenesis and vitellogenesis of the Chinese soft-shelled turtle (Pelodiseus sinensis)

Zygote ◽  
2009 ◽  
Vol 18 (2) ◽  
pp. 109-120 ◽  
Author(s):  
Hei Nainan ◽  
Yang Ping ◽  
Yang Yang ◽  
Liu Jinxiong ◽  
Bao Huijun ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Special Functions ◽  
Dorsal Surface ◽  
Sibling Relationship ◽  
Follicular Epithelium ◽  
Follicular Cells ◽  
Cell Organelles ◽  
Rough Endoplasmic Reticula ◽  
Relationship Of ◽  
Endoplasmic Reticula

SummaryFine structure observations were performed by means of electron microscopy on oogenesis and vitellogenesis and the special functions of follicular cells in the Chinese soft-shelled turtle (Pelodiseus sinensis). Histological examination of the ovary showed a well developed lacunae system containing fine granules, fibres or gelatiniform materials with one or two germinal beds dispersed on the dorsal surface of the ovarian cortex. The process of oogenesis comprised 10 consecutive phases according to the morphology of the yolk platelets, follicular cells and zona pellucida (ZP). Electron microscopy of vitellogenesis revealed some of the mitochondria gradually being transformed into yolk granules. In the advanced stage of vitellogenesis, large amounts of rough endoplasmic reticula, Golgiosomes and other cell organelles that are involved in synthesis and secretion were observed in follicular cells. The ZP was formed by microvilli, thus increasing the absorptive surface of the oocyte and facilitating transport of nutrients from the follicular epithelium to the ooplasm. This study demonstrated that the ovaries of members of the Testudinidae share more features with Archosaurs than with Squamates, indicating that these features were phylogenetically conserved in the Archosauria. The present observations suggest that the accumulation of yolk materials was controlled by the intrinsic and extrinsic pathways as well as by the activity of follicular cells. These results might also support a sibling relationship of the Testudinidae with the Archosauria and not with all extant reptiles.

An unusual complication of Dura Film as a dural substitute

1984 ◽  
Vol 60 (5) ◽  
pp. 1076-1079 ◽  
Author(s):  
Carlos M. Ongkiko ◽  
Jeffrey T. Keller ◽  
Frank H. Mayfield ◽  
Stewart B. Dunsker
Keyword(s):  
Acute Subdural Hematoma ◽  
Unusual Complication ◽  
Graft Material ◽  
Review Of The Literature ◽  
Tumor Removal ◽  
Acute Hemorrhage ◽  
Content Type ◽  
Dural Substitute ◽  
Connective Tissue Capsule ◽  
Tissue Capsule

✓ Two cases are presented in which the patients developed an unusual complication following the use of an artificial dural substitute, silicone-coated Dacron (Dura Film). Both patients had undergone removal of a tumor and involved dura. The first patient developed a very thick connective-tissue capsule of the graft material which simulated a recurrent tumor. The second patient developed an acute hemorrhage initially thought to be an acute subdural hematoma beneath the artificial dura 9 weeks after tumor removal and implantation of the graft. A review of the literature and proposed mechanisms of these complications are presented.

scholarly journals Nano-imaging trace elements at organelle levels in substantia nigra overexpressing α-synuclein to model Parkinson’s disease

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Laurence Lemelle ◽  
Alexandre Simionovici ◽  
Philippe Colin ◽  
Graham Knott ◽  
Sylvain Bohic ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Substantia Nigra ◽  
Trace Element ◽  
Brain Diseases ◽  
Transmission Electron ◽  
Rough Endoplasmic Reticula ◽  
Nano Imaging ◽  
Cellular Compartments ◽  
Endoplasmic Reticula

AbstractSub-cellular trace element quantifications of nano-heterogeneities in brain tissues offer unprecedented ways to explore at elemental level the interplay between cellular compartments in neurodegenerative pathologies. We designed a quasi-correlative method for analytical nanoimaging of the substantia nigra, based on transmission electron microscopy and synchrotron X-ray fluorescence. It combines ultrastructural identifications of cellular compartments and trace element nanoimaging near detection limits, for increased signal-to-noise ratios. Elemental composition of different organelles is compared to cytoplasmic and nuclear compartments in dopaminergic neurons of rat substantia nigra. They exhibit 150–460 ppm of Fe, with P/Zn/Fe-rich nucleoli in a P/S-depleted nuclear matrix and Ca-rich rough endoplasmic reticula. Cytoplasm analysis displays sub-micron Fe/S-rich granules, including lipofuscin. Following AAV-mediated overexpression of α-synuclein protein associated with Parkinson’s disease, these granules shift towards higher Fe concentrations. This effect advocates for metal (Fe) dyshomeostasis in discrete cytoplasmic regions, illustrating the use of this method to explore neuronal dysfunction in brain diseases.

scholarly journals Structure of the Leydig Cell in the African Sideneck Turtle (Pelusios castaneus)

2020 ◽  
Vol 17 (2) ◽  
pp. 19-25
Author(s):  
S. G. Olukole ◽  
B. O. Oke
Keyword(s):  
Blood Vessels ◽  
Leydig Cell ◽  
Comparative Anatomy ◽  
West African ◽  
Freshwater Turtle ◽  
Seminiferous Tubules ◽  
Transmission Electron ◽  
Entire Cell ◽  
Rough Endoplasmic Reticula ◽  
Endoplasmic Reticula

The African sideneck turtle (Pelusios castaneus) is a freshwater turtle of West African origin used in traditional medicine with little consumption as meat. There have been documentations on the reproductive biology of the turtle with no report on the structure of the Leydig cell of the animal. We described the structure of the Leydig cell of the adult African sideneck turtle using histology, microstereology and transmission electron microscopy. The Leydig cell of the African sideneck turtle were elliptical in shape when found proximal to blood vessels and elongated at other points within the testicular interstitium. Leydig cells occurred in cords or clusters of varying sizes and numbers (3-5 cells) that appear to be random in distribution possessing round to ovoid nuclei containing small amount of peripherally disposed heterochromatin with prominent nucleoli. The seminiferous tubules of the turtle occupied about 85% of the total testicular parenchyma while the interstitium occupied 15% of it. Of this 15%, the Leydig cell occupied about 10% while the stromal elements, inclusive of blood vessels occupied the remaining 5%. The cytoplasm of the Leydig cell was about 85% of the entire cell and comprised microfilaments, lipid droplets, smooth and rough endoplasmic reticula as well as numerous mitochondria. In conclusion, the histological and ultrastructural features of the Leydig cell of the African sideneck turtle bear close similarities with those of other reptiles with little variations. These variations include interstitial location as well as in relation to blood vessels within the testicular interstitium. Information made available by this study is expected to be useful in the comparative anatomy of the Leydig cell of turtles and reptiles.

scholarly journals Morphogenesis lymph node of domestic pig

2020 ◽  
pp. 102-109
Author(s):  
E. Gavrilina ◽  
A. Kolesnyk
Keyword(s):  
Lymph Node ◽  
Lymph Nodes ◽  
Lymphatic Vessels ◽  
Linear Measurements ◽  
Domestic Pig ◽  
Newborn Piglets ◽  
Connective Tissue Capsule ◽  
Degree Of Consolidation ◽  
Number Of Segments ◽  
Tissue Capsule

The visceral and somatic lymph nodes of a pig of domestic 1-120 day old were examined. Found that the lymph nodes have a common connective tissue capsule and different levels of fusion of individual subunits. In the center of each subunit, the capsule forms invaginations of the capsular trabecula, dividing the parenchyma of each structural unit into «Ʊ»-shaped structures, fused with lateral and lower parts. The number and degree of fusion of subunits is different and depends on the age of the animals and the location of the lymph node. The greatest degree of fusion of individual units of the lymph node was found in the superficial cervical and axillary I ribs. In the mandibular, superficial parotid and superficial inguinal lymph nodes, the segments are clearly contoured already in newborn piglets. Segments are predominantly bean-spherical in shape with a wide base. The fusion of the segments occurs in their central part, and on the surface the gates of the subunits are clearly contoured in the form of numerous depressions. In the visceral lymph nodes, the portal and splenic lymph nodes have the smallest segmentation, and the gastric, tracheobronchial, and iliocolic lymph nodes are the largest. The number of segments varies from two in newborn piglets to five in 120-day-old pigs. The variability of the morphometric parameters of the lymph nodes of a domestic pig is due to a different number of afferent lymphatic vessels, and, accordingly, to different scales of the lymphatic basins. Thus, the lymph nodes of the domestic pig are complexes of subunits fused to varying degrees. Somatic lymph nodes are highly segmented. The degree of consolidation of subunits in the visceral lymph nodes is less pronounced. Linear measurements of organs vary depending on the age of the animals, gradually increasing up to 120 days with a tendency for these indicators to prevail in the somatic lymph nodes. Key words: domestic pig, lymph node, subunit, topography, morphometry

scholarly journals A Quiescent Colossal Radicular Cyst: A Diverse Histological Presentation

2013 ◽  
Vol 4 (4) ◽  
pp. 286-290
Author(s):  
V Reshma ◽  
Radhika M Bavle ◽  
BK Varsha ◽  
BM Kavya
Keyword(s):  
Connective Tissue ◽  
Periodontal Ligament ◽  
Radicular Cyst ◽  
Cell Infiltrate ◽  
Jaw Cysts ◽  
Connective Tissue Capsule ◽  
Tissue Capsule

ABSTRACT Radicular cysts are the most frequent inflammatory cysts comprising of about 52 to 68% of all the jaw cysts. It arises from the epithelial residues in the periodontal ligament space following pulpal necrosis. The distinguished lining of the cystic lumen is hyperplastic stratified squamous nonkeratinizing epithelium showing arcading pattern with dense infammatory cell infiltrate, cholesterol clefts, Russell bodies and Ruston bodies in the connective tissue capsule. Here, we present an unusual large radicular cyst lined almost entirely by quiescent atrophic epithelium, which is innocuous, persistent, has enlarged overtime, with minimal infammatory cells in the connective tissue capsule. How to cite this article Reshma V, Bavle RM, Varsha BK, Kavya BM. A Quiescent Colossal Radicular Cyst: A Diver Histological Presentation. World J Dent 2013;4(4):286-290.

scholarly journals Frequency and characterization of celiac ganglia diagnosed on fine-needle aspiration

CytoJournal ◽  
2015 ◽  
Vol 12 ◽  
pp. 4 ◽  
Author(s):  
Ehab A. ElGabry ◽  
Sara E. Monaco ◽  
Liron Pantanowitz
Keyword(s):  
Fine Needle Aspiration ◽  
Ganglion Cells ◽  
Needle Aspiration ◽  
Celiac Artery ◽  
Fine Needle ◽  
Round Nucleus ◽  
Adequacy Assessment ◽  
Abdominal Lesions ◽  
Prominent Nucleolus

Introduction: Endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA) is frequently used to sample intra-abdominal lesions and lymph nodes. Celiac ganglia normally located near the celiac artery may be sampled during these procedures. The aim of this study was to determine the frequency of detection and cytologic findings of celiac ganglia diagnosed on FNA. Materials and Methods: A 14-year retrospective review of radiologic and endoscopic FNA cases involving the celiac region was performed. Cases in which ganglia were reported were further analyzed and slides reviewed. Results: A total of 354 patients underwent FNA of a suspected celiac lymph node (334 patients) or celiac mass (20 cases). In 9 of these patients (2.5%), ganglion cells were identified. These were identified in cases only after 2008 via EUS-guided FNA. Aspirates were hypocellular and bloody. Large ganglion cells were either sparsely dispersed or present in clusters. Ganglion cells had a low N: C ratio, granular cytoplasm with neuromelanin, and eccentric small round nucleus with a prominent nucleolus. One specimen had concomitant pancreatic adenocarcinoma. None of these cases had a false positive on-site adequacy assessment or final misdiagnosis. Conclusions: These data show that celiac ganglia may be infrequently encountered, especially with intra-abdominal EUS-guided FNA targeting nodes or masses near the celiac region. Therefore, cytologists should be aware of the possibility of finding ganglionic cells in EUS-guided FNA samples.

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