scholarly journals Classification of Neuroendocrine Tumors: Consensus Guidelines for the Management and Treatment

2017 ◽  
Vol 1 (2) ◽  
pp. 01-04
Author(s):  
Sonallah Ibrahim
Keyword(s):  
Biogenic Amines ◽  
Neuroendocrine Tumors ◽  
Secretory Granules ◽  
The Body ◽  
Carcinoid Tumors ◽  
Consensus Guidelines ◽  
Nervous Systems ◽  
Common Features ◽  
Polypeptide Hormones

Neuroendocrine tumors (NETs) are neoplasms that arise from cells of the endocrine (hormonal) and nervous systems. Many are benign, while some are malignant. They most commonly occur in the intestine, where they are often called carcinoid tumors, but they are also found in the pancreas, lung and the rest of the body. Although there are many kinds of NETs, they are treated as a group of tissue because the cells of these neoplasms share common features, such as looking similar, having special secretory granules, and often producing biogenic amines and polypeptide hormones.

scholarly journals Recent advances and conceptual changes in the classification of neuroendocrine tumors of the thymus

2021 ◽  
Author(s):  
Hanibal Bohnenberger ◽  
Philipp Ströbel
Keyword(s):  
Neuroendocrine Tumors ◽  
Classification Systems ◽  
The Body ◽  
Histological Classification ◽  
Recent Advances ◽  
Conceptual Changes ◽  
Tumors Of The Thymus ◽  
Thymic Carcinomas

AbstractNeuroendocrine tumors of the thymus (TNET) are exceedingly rare neoplasms. Their histomorphology is identical to neuroendocrine tumors elsewhere in the body (in particular the lungs) and bears no similarity with thymomas and thymic carcinomas. Recent molecular findings have profoundly changed our perception of these tumors and may impact future histological classification systems.

Analysis of the Anterior Secretory Cells of Onchidohs Muricata (Nudibranchia)

1981 ◽  
Vol 39 ◽  
pp. 614-615
Author(s):  
Roy Skidmore
Keyword(s):  
Endoplasmic Reticulum ◽  
Secretory Granules ◽  
Golgi Body ◽  
The Body ◽  
Secretory Cells ◽  
Secretory Vesicles ◽  
High Magnification ◽  
Large Numbers ◽  
Membrane Bound ◽  
Sole Of The Foot

The long-necked secretory cells in Onchidoris muricata are distributed in the anterior sole of the foot. These cells are interspersed among ciliated columnar and conical cells as well as short-necked secretory gland cells. The long-necked cells contribute a significant amount of mucoid materials to the slime on which the nudibranch travels. The body of these cells is found in the subepidermal tissues. A long process extends across the basal lamina and in between cells of the epidermis to the surface of the foot. The secretory granules travel along the process and their contents are expelled by exocytosis at the foot surface.The contents of the cell body include the nucleus, some endoplasmic reticulum, and an extensive Golgi body with large numbers of secretory vesicles (Fig. 1). The secretory vesicles are membrane bound and contain a fibrillar matrix. At high magnification the similarity of the contents in the Golgi saccules and the secretory vesicles becomes apparent (Fig. 2).

Three new species, two new genera, and new family Biphragmosagittidae (Сhaetognatha) from Southwest Pacific Ocean

2011 ◽  
Vol 20 (1) ◽  
pp. 161-173
Author(s):  
A.P. Kassatkina
Keyword(s):  
New Species ◽  
Type Species ◽  
Morphological Characters ◽  
The Body ◽  
New Order ◽  
New Genera ◽  
New Family ◽  
The Family ◽  
Three New Species

Resuming published and own data, a revision of classification of Chaetognatha is presented. The family Sagittidae Claus & Grobben, 1905 is given a rank of subclass, Sagittiones, characterised, in particular, by the presence of two pairs of sac-like gelatinous structures or two pairs of fins. Besides the order Aphragmophora Tokioka, 1965, it contains the new order Biphragmosagittiformes ord. nov., which is a unique group of Chaetognatha with an unusual combination of morphological characters: the transverse muscles present in both the trunk and the tail sections of the body; the seminal vesicles simple, without internal complex compartments; the presence of two pairs of lateral fins. The only family assigned to the new order, Biphragmosagittidae fam. nov., contains two genera. Diagnoses of the two new genera, Biphragmosagitta gen. nov. (type species B. tarasovi sp. nov. and B. angusticephala sp. nov.) and Biphragmofastigata gen. nov. (type species B. fastigata sp. nov.), detailed descriptions and pictures of the three new species are presented.

The Funerary Architecture of the La Tène Period in North-western Gaul and Southern Britain

2020 ◽  
Vol 86 ◽  
pp. 285-304
Author(s):  
Emilie Vannier
Keyword(s):  
Human Remains ◽  
The Body ◽  
Common Features ◽  
Architectural Elements ◽  
Funerary Architecture ◽  
La Tène ◽  
Materials Used ◽  
La Tene ◽  
North Western

This paper concerns the architecture of formal burials from the La Tène period in north-western Gaul and southern Britain. The research focuses on the shape and dimensions of sepulchral pits containing inhumed or burnt human remains, on the different materials used for the internal elements, and the external constructions and structures covering, framing, or marking the burials. The study of these data exposes the preferred choices in the funerary architecture of Gallic and British communities during the last five centuries bc. The results reveal different regional funerary groups within three main cross-Channel zones according to the architectural elements of the graves and the main treatments of the body. The distinct characteristics of these groups highlight their common features and relationships with neighbouring areas of the Continental and Atlantic zones.

scholarly journals Mixed adenoneuroendocrine carcinoma of the hepatic bile duct: a case report and review of the literature

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Sulai Liu ◽  
Zhendong Zhong ◽  
Meng Xiao ◽  
Yinghui Song ◽  
Youye Zhu ◽  
...  
Keyword(s):  
Bile Duct ◽  
Neuroendocrine Tumors ◽  
Radical Surgery ◽  
Malignant Tumors ◽  
World Health ◽  
Ki 67 ◽  
Mixed Adenoneuroendocrine Carcinoma ◽  
Hilar Bile Duct ◽  
Hilar Tumor

Abstract Background The World Health Organization's updated classification of digestive system neuroendocrine tumors in 2010 first proposed the classification of mixed adenoneuroendocrine carcinoma (MANEC). The incidence of biliary malignant tumors with neuroendocrine tumors accounts for less than 1% of all neuroendocrine tumors. Moreover, the incidence of hilar bile duct with MANEC is very rare. Case presentation A 65-year-old female patient came to our hospital for repeated abdominal pain for more than 4 months and skin sclera yellow staining for 1 week. Contrast-enhanced computed tomography imaging and magnetic resonance results suggested a hilar tumor for Bismuth-Corlette Type II. The patient underwent radical surgery for hilar cholangiocarcinoma. Finally, the patient was diagnosed with hilar bile duct MANEC, staged 1 (pT1N0M0) based on the eighth edition of the AJCC. Histopathology showed that the tumor was a biliary tumor with both adenocarcinoma and neuroendocrine carcinoma. No evidence of recurrence and metastasis after 20 months of follow-up. Conclusions We first reported a MANEC that originated in the hilar bile duct. As far as we known, there were few reports of biliary MANEC, and the overall prognosis was poor. We also found that the higher the Ki-67 index, the worse the prognosis of this type of patient. Radical surgery is the most effective treatment.

scholarly journals Molecular Pathology of Well-Differentiated Pulmonary and Thymic Neuroendocrine Tumors: What Do Pathologists Need to Know?

2021 ◽  
Vol 32 (1) ◽  
pp. 154-168 ◽  
Author(s):  
Marco Volante ◽  
Ozgur Mete ◽  
Giuseppe Pelosi ◽  
Anja C. Roden ◽  
Ernst Jan M. Speel ◽  
...  
Keyword(s):  
Neuroendocrine Tumors ◽  
Young Patients ◽  
Carcinoid Tumors ◽  
Neuroendocrine Neoplasms ◽  
Grey Zone ◽  
Cell Hyperplasia ◽  
Ki 67 ◽  
Familial Form ◽  
Well Differentiated ◽  
Neuroendocrine Carcinomas

AbstractThoracic (pulmonary and thymic) neuroendocrine tumors are well-differentiated epithelial neuroendocrine neoplasms that are classified into typical and atypical carcinoid tumors based on mitotic index cut offs and presence or absence of necrosis. This classification scheme is of great prognostic value but designed for surgical specimens, only. Deep molecular characterization of thoracic neuroendocrine tumors highlighted their difference with neuroendocrine carcinomas. Neuroendocrine tumors of the lung are characterized by a low mutational burden, and a high prevalence of mutations in chromatin remodeling and histone modification-related genes, whereas mutations in genes frequently altered in neuroendocrine carcinomas are rare. Molecular profiling divided thymic neuroendocrine tumors into three clusters with distinct clinical outcomes and characterized by a different average of copy number instability. Moreover, integrated histopathological, molecular and clinical evidence supports the existence of a grey zone category between neuroendocrine tumors (carcinoid tumors) and neuroendocrine carcinomas. Indeed, cases with well differentiated morphology but mitotic/Ki-67 indexes close to neuroendocrine carcinomas have been increasingly recognized. These are characterized by specific molecular profiles and have an aggressive clinical behavior. Finally, thoracic neuroendocrine tumors may arise in the background of genetic susceptibility, being MEN1 syndrome the well-defined familial form. However, pathologists should be aware of rarer germline variants that are associated with the concurrence of neuroendocrine tumors of the lung or their precursors (such as DIPNECH) with other neoplasms, including but not limited to breast carcinomas. Therefore, genetic counseling for all young patients with thoracic neuroendocrine neoplasia and/or any patient with pathological evidence of neuroendocrine cell hyperplasia-to-neoplasia progression sequence or multifocal disease should be considered.

Classification of low-grade neuroendocrine tumors of midgut and unknown origin

2002 ◽  
Vol 33 (11) ◽  
pp. 1126-1132 ◽  
Author(s):  
Susanne van Eeden ◽  
Pascal F.H.J. Quaedvlieg ◽  
Babs G. Taal ◽  
G.Johan A. Offerhaus ◽  
Cornelis B.H.W. Lamers ◽  
...  
Keyword(s):  
Neuroendocrine Tumors ◽  
Unknown Origin ◽  
Low Grade

scholarly journals ENETS 2016 Consensus Guidelines for the Management of Patients with Digestive Neuroendocrine Tumors: An Update

2016 ◽  
Vol 103 (2) ◽  
pp. 117-118 ◽  
Author(s):  
Dermot O'Toole ◽  
Reza Kianmanesh ◽  
Martyn Caplin
Keyword(s):  
Neuroendocrine Tumors ◽  
Consensus Guidelines

ALLERGENIC ACTIVITY AND DANGER OF INDUSTRIAL DUSTS OF DRY PRODUCTS OF COW'S MILK PROCESSING

2021 ◽  
pp. 51-55
Author(s):  
Baranov S.A. ◽  
◽  
Shevlyakov V.V. ◽  
Sychyk S.I. ◽  
Filonyuk V.A. ◽  
...  
Keyword(s):  
Milk Proteins ◽  
The Body ◽  
Cow’S Milk ◽  
Antigenic Determinants ◽  
Allergic Reactions ◽  
Cow's Milk ◽  
Milk Processing ◽  
Allergenic Activity

The purpose of the work was to establish in a model experiment the allergenic activity and danger of the extracts obtained from the dust of dry products of cow's milk processing (DPMP), containing complexes of soluble whey (WMP) or casein milk proteins (CMP), as a stage of hygienic regulation of the content of dust DPMP in the air of the working area. Experiments on albino guinea pigs sensitized by the intradermal injection of standard doses of WMP and СМР solutions into the ear revealed the development of severe allergic reactions in the animals of the experimental groups with the prevalence of mixed mechanisms of immediate anaphylactic and delayed cell-mediated types. According to the criteria for the classification of industrial allergens, the WMP and СМР complexes have a strong allergenic activity and are differentiated to the 1-st class of allergenic hazard, which determines the classification of the DPMP dust containing them as extremely dangerous industrial allergens. This is confirmed by the established high levels of indicators of allergic-diagnostic reactions in vivo and in vitro when testing sensitized WMP and СМР animals with a solution of skim milk powder dust, indicating the presence of antigenic determinants of whey and casein milk proteins in it and a real ability to form cross-allergic reactions in the body of workers to dust from all dry milk processing products containing these proteins.

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