scholarly journals Aciniccell carcinoma of the salivary glands: clinical and histopathological study of 12 cases

2021 ◽  
Vol 31 (3) ◽  
pp. 12-23
Author(s):  
ME Samar ◽  
◽  
RE Avila ◽  
RV Ferraris ◽  
PE Garcia ◽  
...  
Keyword(s):  
Salivary Glands ◽  
Cell Types ◽  
Cell Labeling ◽  
World Health ◽  
Numerical Code ◽  
Glandular Cell ◽  
Histopathological Study ◽  
Low Grade ◽  
Epithelial Tumor ◽  
Glandular Cells

Objective:Acinic cell carcinoma (CCA) is the third malignant epithelial tumor of the salivary glands in adults; low-grade tumor of malignancy, composed of neoplastic cells with serous acinar differentiation. The objective of this work was to analyze 12 cases of CCA according to their location, clinical characteristics, histological and immunohistochemical pattern and cell types, following the latest classification of the World Health Organization. Methods: The study included 12 cases of CCA from the files of salivary tumor biopsies of our work team, corresponding to the period 1997-2020. A numerical code was used to identify the samples, preserving the identity of the patients. Histological sections of the paraffin-embedded biopsies were evaluated with H/E, PAS and Toluidine blue and immunostained with the monoclonal antibodies pancytokeratin AE1 / AE3, Ki67, MUC-1 and mammaglobin. Results: The most frequent histologic pattern was the solid type as a single pattern or integrated with other patterns of lesser development, with almost exclusive location in the parotid gland and more frequent in women. Cells like normal acinar serocytes predominated in the solid growth pattern. The most frequent cell type in the microcystic patternwas the nonspecific glandular cell together with a lower proportion of acinar and intercalated duct-like cells. The papillary-cystic pattern was lined by nonspecific glandular cells. No clear cells found. With Ki67 a low cell proliferation was demonstrated in all the cases studied. Cell labeling for MUC-1 was grade 1 positive (less than 10% immunoreactive cells) and negative for mammaglobin.Conclusions: Patient follow-up is a priority because CCA tends to recur and metastasize and its behavior can become aggressive. We must deepen the study of its proliferative capacity as a treatment and prognosis tool, especially with immunohistochemistry and standardized molecular biology methods.

Ultrastructural characterization of the adhesive organ ofIdiosepius biserialisandIdiosepius pygmaeus(Mollusca: Cephalopoda)

2011 ◽  
Vol 91 (7) ◽  
pp. 1499-1510 ◽  
Author(s):  
Norbert Cyran ◽  
Waltraud Klepal ◽  
Janek von Byern
Keyword(s):  
Cell Types ◽  
Columnar Cell ◽  
Secretory Process ◽  
Glandular Cell ◽  
Granular Cells ◽  
Marine Animals ◽  
Adhesive Organ ◽  
Bonding System ◽  
Glandular Cells ◽  
Columnar Cells

Water drift and tidal rise make the use of bonding mechanisms beneficial for small benthopelagic or interstitial marine animals. Chemical adhesives for attachment are very common in molluscs; however, only a few cephalopods have glue producing organs. The family Idiosepiidae is characterized by an epithelial adhesive organ (AO) located on the posterior part of the dorsal mantle area. Previous morphological and histological studies described three non-glandular cell types (basal, interstitial and fusiform cells) and three glandular cell types (goblet, columnar and granular cells) containing protein and carbohydrate components. However, these studies provide different information about the nomenclature and characteristics of the cell types. The present ultrastructural analyses and a 3D reconstruction of the AO ofIdiosepius pygmaeusandIdiosepius biserialistherefore serve to investigate the cell distribution, the fine structure of the cells and possible interactions between the cells.We found that basal cells form a continuous cell layer along the basal membrane, overlapped by the other epithelial cells. Embedded in microvilli-covered interstitial cells the glandular cells are more or less evenly distributed within the AO. Goblet and granular cells are solitary glandular cells without conspicuous morphological characteristics, whereas the columnar cells are arranged in dense aggregations of 5–15 cells. Each columnar cell is enclosed by a narrow supporting interstitial cell which contains dense longitudinal filament strands. The secretory process of the cells in the aggregation is synchronized. Each columnar cell aggregate bears approximately two ciliated sensory fusiform cells. The fusiform cells are connected to a neuronal network, aligned along the epithelium base.The results suggest that the bonding system is affected by two secretory cell types (granular and columnar cells). Both are similar in content, synthesis and secretory process but columnar cells are embedded in a particular cell environment. It is unclear in what way this arrangement is associated with the function of the AO. The neurons in several parts of the AO point to a neuronal control of the bonding mechanism. Comparisons with the AO cells of other cephalopods provide no indications for a morphological relationship between the adhesive systems.

scholarly journals Epithelial-Myoepithelial Carcinoma of the Salivary Gland

2013 ◽  
Vol 28 (1) ◽  
pp. 36-37
Author(s):  
Jose M. Carnate ◽  
José Florencio F. Lapeña
Keyword(s):  
Salivary Gland ◽  
Cell Types ◽  
Myoepithelial Cells ◽  
World Health ◽  
Low Grade ◽  
Myoepithelial Carcinoma ◽  
S 100 ◽  
Grade Malignancy ◽  
Epithelial Myoepithelial Carcinoma ◽  
Health Organization

The World Health Organization  (2005) defines an epithelial-myoepithelial carcinoma (EMC) as a malignancy composed of two cell types that typically form duct-like structures.1 We present herein an archival case from the parotid gland.   EMC occurs primarily in the major salivary glands particularly in the parotid where it presents as a painless, slow-growing mass.1  Microscopic examination shows bi-layered tubular duct-like structures with pale to clear areas (Figure 1). The inner luminal layer is composed of cuboidal cells that are of epithelial derivation while the outer layer is composed  of polygonal cells that are of myoepithelial derivation (Figures 2 and 3). The latter typically have abundant clear cytoplasm.1,2 The  epithelial-myoepithelial  dualism is confirmed using immunohistochemical  stains; the epithelial cells being immunoreactive  for low molecular weight keratin and the myoepithelial cells for S-100 protein, muscle specific actin, vimentin and p63.1, 3   EMC is primarily a tumor of adulthood with peak incidence in the sixth and seventh decades. First described by Donath et al. in 1972,3   they are rare salivary gland neoplasms with an incidence of less than 1% arising mainly in the parotid gland4   although they have been documented in the lungs.5  Perineural and vascular invasion are frequent and recurrence occurs in around 40% of cases and metastasis in 14%.1 Although thought to be of low-grade malignancy, fatal courses have been described4  and “analysis of the various series have demonstrated that tumors with a solid growing pattern, nuclear atypia, DNA aneuploidy and high proliferative activity, generally have a more aggressive behavior and a higher frequency of local recurrences and metastases.”3

scholarly journals Nonintestinal-Type Sinonasal Adenocarcinoma

2009 ◽  
Vol 24 (2) ◽  
pp. 41-42
Author(s):  
Jose M. Carnate
Keyword(s):  
Salivary Gland ◽  
Nasal Cavity ◽  
Salivary Glands ◽  
Intestinal Type ◽  
Low Grade ◽  
High Grade ◽  
Epithelial Tumor ◽  
Poorly Differentiated ◽  
Well Differentiated ◽  
Gland Type

Malignant glandular neoplasms of the sinonasal tract originate either from the respiratory epithelium or the underlying mucoserous glands. They present with a confusing array of morphologic features and this is reflected in the nomenclature of these tumors. These tumors are grouped into three main types: salivary gland-type, intestinal-type and non-intestinal type adenocarcinomas.1 Salivary gland-type adenocarcinomas of the nasal cavity histologically resemble their analogous lesions in the major and minor salivary glands. Adenoid cystic carcinoma is the most common although almost any of those described in the salivary glands can occur in the nasal cavity as well. Intestinal-type adenocarcinomas resemble glandular neoplasms that occur in the small and large intestines. The more well-differentiated ones resemble colonic tubular and villous adenomas while those at the other end of the spectrum resemble moderately to poorly-differentiated colonic adenocarcinomas. Others may be composed of goblet cells or resemble colonic mucinous carcinomas. Nonintestinal-type adenocarcinomas are the most diverse of the lot and are composed of adenocarcinomas whose morphologies do not easily fit in into the previous two categories. For purposes of prognostication, they are divided into low-grade and high-grade categories based on architecture, nuclear features and mitotic activity. Low-grade tumors have uniform cells arranged in compact acini, back to back, confluent glands, cystic spaces and papillae. They maintain tall columnar to cuboidal arrangements without much stratification. Cytoplasm is often abundant but variable in appearance – basophilic, granular, mucinous, eosinophilic and also oncocytic. Nuclear atypia is mild to moderate with few mitoses. High-grade tumors are mostly solid, show prominent nuclear pleomorphism, nucleoli and mitotic activitiy. Signet-ring cells may be seen. Necrosis may often be present.2,3,4 We present the case of a 73 year old female with a destructive left nasal cavity mass. Biopsy shows an infiltrative epithelial tumor with a papillary configuration composed of tumor cells draped around vascular cores (Fig. 1 and Fig. 2). High-power view shows cuboidal to polygonal cells that have large, angular and hyperchromatic nuclei without distinct nucleoli. Mitoses are difficult to come by. Cytoplasm is moderate to abundant and has a dense eosinophilic, somewhat oncocytic quality (Fig. 3 and Fig. 4). Mucin-secreting or other intestinal-type cells are not seen. The case was signed out as a low-grade, papillary, nonintestinal-type adenocarcinoma. Unfortunately, the patient was subsequently lost to follow-up. Among patients with intestinal- and nonintestinal-type adenocarcinomas, histologic grade affects outcome. Well-differentiated tumors with predominantly papillary and tubular configurations do better (80% 5-year survival) while poorly differentiated ones do poorly (40% 5-year survival). Recurrences develop in about 50% and distant metastasis in 15%. Overall survival is about 40% with death occurring in approximately 3 years. Treatment is radical surgical resection with post-operative radiotherapy.1

scholarly journals Histopathological study of endometrial stromal sarcomas

2018 ◽  
Vol 7 (12) ◽  
pp. 4891 ◽  
Author(s):  
Salma Bhat ◽  
Ambreen Beigh ◽  
Summyia Farooq
Keyword(s):  
Malignant Tumors ◽  
Endometrial Stromal Sarcoma ◽  
Abnormal Uterine Bleeding ◽  
World Health ◽  
Small Cells ◽  
Histopathological Study ◽  
Low Grade ◽  
Endometrial Polyps ◽  
Stromal Sarcoma ◽  
The Mean

Background: Endometrial stromal sarcomas (ESSs) are rare malignant uterine tumours comparatively affecting younger women and the mean age is 42 to 58 years. The World Health Organization (WHO) classification categorises endometrial stromal neoplasms and related tumors as: endometrial stromal nodule (ESN), low-grade endometrial stromal sarcoma (LG-ESS), high-grade endometrial stromal sarcoma (HG-ESS), and undifferentiated uterine sarcoma (UUS).Methods: Present study is a retrospective one and includes 6 patients with histologically proven endometrial stromal sarcoma for a period of 3 years. Authors examined every slide available from each case and new HE-stained slides generated from formaline-fixed, paraffin-embedded tissue were reviewed to confirm the diagnoses. Demographic information, pathologic, and treatment information were collected from the clinic and hospital charts. All had primary surgical management in the form of total abdominal hysterectomy and salpingo-oophorectomy.Results: The mean patient age was 41 years. All of the patients had presented with abnormal uterine bleeding. Diffuse growth of small cells closely resembling those of the normal proliferative endometrial stroma was the characteristic feature of these tumors. All of these patients had a low grade ESS on histopathology. They had regular follow-up visits until the end of study.Conclusions: Endometrial stromal sarcomas are rare malignant tumors of the uterus and a proper preoperative diagnosis is difficult. Their differential diagnosis from typical submucosal uterine myomas or benign endometrial polyps can be difficult. The histological examination of the specimen is necessary to exclude malignancy and establish the final diagnosis.

scholarly journals Angiotensinogen, Prorenin, and Renin Are Co-localized in the Secretory Granules of All Glandular Cells of the Rat Anterior Pituitary: An Immunoultrastructural Study

1998 ◽  
Vol 46 (3) ◽  
pp. 301-311 ◽  
Author(s):  
Evelyne Vila-Porcile ◽  
Pierre Corvol
Keyword(s):  
Anterior Pituitary ◽  
Secretory Pathway ◽  
Secretory Granules ◽  
Mammalian Species ◽  
Simultaneous Detection ◽  
Renin Angiotensin System ◽  
Cell Types ◽  
Local System ◽  
Glandular Cell ◽  
Glandular Cells

In addition to the circulating renin–angiotensin system (RAS), a local system has been postulated in the anterior pituitary because immunodetection of its components in various mammalian species. However, different cell types appear to be involved in different species, and there is no general consensus on the subcellular localization of prorenin, renin and angiotensinogen. In this ultrastructural study, we investigated and quantified the presence of these components using double or triple immunogold labeling methods, in all the immunologically identified glandular cell types of the rat anterior pituitary. In contrast to previous reports, all these components were identified not only in lactotropes and gonadotropes but also in somatotropes, corticotropes, and thyrotropes. The highest levels were detected in lactotropes and gonadotropes, and renin gave the greatest signal. Angio-tensinogen, prorenin, and renin were co-localized in the secretory granules of all rat pituitary glandular cell types. The simultaneous detection of the substrate (angiotensinogen) and both its specific cleavage enzyme and its proenzyme within the same granule suggests intragranular processing of this component. Moreover, the localization of these three constituents in the secretory granules also suggests that, in the rat anterior pituitary, they follow the regulated secretory pathway.

scholarly journals Sequential production of gametes during meiosis in trypanosomes

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Lori Peacock ◽  
Chris Kay ◽  
Chloe Farren ◽  
Mick Bailey ◽  
Mark Carrington ◽  
...  
Keyword(s):  
Salivary Glands ◽  
Nuclear Dna ◽  
Nuclear Dna Content ◽  
Cell Types ◽  
Tsetse Fly ◽  
Binucleate Cell ◽  
Insect Vector ◽  
Content Ratio ◽  
Different Cell Types ◽  
Meiosis I

AbstractMeiosis is a core feature of eukaryotes that occurs in all major groups, including the early diverging excavates. In this group, meiosis and production of haploid gametes have been described in the pathogenic protist, Trypanosoma brucei, and mating occurs in the salivary glands of the insect vector, the tsetse fly. Here, we searched for intermediate meiotic stages among trypanosomes from tsetse salivary glands. Many different cell types were recovered, including trypanosomes in Meiosis I and gametes. Significantly, we found trypanosomes containing three nuclei with a 1:2:1 ratio of DNA contents. Some of these cells were undergoing cytokinesis, yielding a mononucleate gamete and a binucleate cell with a nuclear DNA content ratio of 1:2. This cell subsequently produced three more gametes in two further rounds of division. Expression of the cell fusion protein HAP2 (GCS1) was not confined to gametes, but also extended to meiotic intermediates. We propose a model whereby the two nuclei resulting from Meiosis I undergo asynchronous Meiosis II divisions with sequential production of haploid gametes.

scholarly journals CBIO-19. LOW GLOBAL HISTONE H4 ACETYLATION LEVELS REVEAL CANDIDATE QUIESCENT CELL POPULATIONS IN GLIOMA AND DISTINGUISH TUMORS BY GRADE

2020 ◽  
Vol 22 (Supplement_2) ◽  
pp. ii19-ii19
Author(s):  
Anca Mihalas ◽  
Heather Feldman ◽  
Anoop Patel ◽  
Patrick Paddison
Keyword(s):  
Cell Types ◽  
Strand Break ◽  
Cell Cycle Gene ◽  
Low Grade ◽  
Histone H4 ◽  
Current Standard ◽  
A Genome ◽  
Histone H4 Acetylation

Abstract Current standard of care therapy for glioblastoma (GBM) includes cytoreduction followed by ablative therapies that target rapidly dividing cell types. However, the presence of quiescent-like/G0 states, therefore, represents a natural reservoir of tumor cells that are resistant to current treatments. Quiescence or G0 phase is a reversible state of “stasis” cells enter in response to developmental or environmental cues. To gain insight into how glioblastoma cells might regulate G0-like states, we performed a genome-wide CRISPR-Cas9 screen in patient-derived GBM stem-like cells (GSCs) harboring a G0-reporter to identify genes that when inhibited trap GSCs in G0-like states. Among the top screen hits were members of the Tip60/KAT5 histone acetyltransferase complex, which targets both histones (e.g., H4) and non-histone proteins for acetylation. NuA4 functions as a transcriptional activator, whose activities are coordinated with MYC in certain contexts, and also participates in DNA double-strand break repair by facilitating chromatin opening. However, currently little is known about the roles for NuA4 complex in GBM biology. Through modeling KAT5 function in GSC in vitro cultures and in vivo tumors, we find that KAT5 inhibition causes cells to arrest in a G0-like state with high p27 levels, G1-phase DNA content, low protein synthesis rates, low rRNA rates, lower metabolic rate, suppression of cell cycle gene expression, and low histone H4 acetylation. Interestingly, partial inhibition of KAT5 activity slows highly aggressive tumor growth, while increasing p27hi H4-aclow populations. Remarkably, we that low grade gliomas have significantly higher H4-aclow subpopulations and generally lower H4-ac levels than aggressive grade IV tumors. Taken together, our results suggest that NuA4/KAT5 activity may play a key role in quiescence ingress/egress in glioma and that targeting its activity in high grade tumors may effectively “down grade” them, thus, increase patient survival.

Relationship between Immunophenotype and Clinicopathological Findings for Superficial Nonampullary Duodenal Epithelial Tumor

Digestion ◽  
2021 ◽  
pp. 1-8
Author(s):  
Shigeki Fukusada ◽  
Takaya Shimura ◽  
Hiroyasu Iwasaki ◽  
Yusuke Okuda ◽  
Takahito Katano ◽  
...  
Keyword(s):  
Malignant Potential ◽  
Low Grade ◽  
Negative Group ◽  
Epithelial Tumor ◽  
Endoscopic Findings ◽  
Intestinal Phenotype ◽  
Oral Side ◽  
Clinicopathological Findings ◽  
Gastric Phenotype ◽  
The Relationship

<b><i>Introduction:</i></b> The natural history and prognosis of superficial nonampullary duodenal epithelial tumors (SNADETs) remain uncertain. We elucidated the relationship between immunophenotype and clinicopathological features. <b><i>Materials and Methods:</i></b> A total of 98 SNADETs were divided into 3 groups according to immunohistochemical findings: gastric phenotype (G type), gastrointestinal phenotype (GI type), and intestinal phenotype (I type). Cellular dysplasia was divided into low-grade dysplasia and high-grade dysplasia/adenocarcinoma (≥HGD). White opaque substance (WOS) deposition was categorized into diffuse WOS, partial WOS, and no WOS, based on endoscopic findings. <b><i>Results:</i></b> Of the 98 SNADETs, 4 lesions (4.1%) were G type, 32 lesions (32.7%) were GI type, and 62 lesions (63.2%) were I type. All G-type SNADETs were located in the oral side of the papilla including the bulb, and the rate of bulbar lesions was significantly higher in the G type than in the GI and I types (<i>p</i> = 0.004). The most frequent type of WOS was no WOS (4/4, 100%) for G type, partial WOS (19/32, 59.4%) for GI type, and diffuse WOS (34/62, 54.8%) for I type (<i>p</i> &#x3c; 0.001), and loss of intestinal character was significantly correlated with WOS deficiency. GI/I-type SNADETs with partial or no WOS and G-type SNADETs were associated with ≥HGD. Additionally, the frequency of ≥HGD lesion was significantly higher in the CD10-negative group than in the CD10-positive group (57.1 vs. 19.8%, <i>p</i> = 0.043). <b><i>Conclusion:</i></b> Pathological intestinal character was correlated with the presence of WOS, and CD10 loss was associated with malignant potential of SNADETs.

scholarly journals Electron Microscopic Immunogold Localization of Salivary Mucins MG1 and MG2 in Human Submandibular and Sublingual Glands

2003 ◽  
Vol 51 (1) ◽  
pp. 69-79 ◽  
Author(s):  
Marco Piludu ◽  
Sean A. Rayment ◽  
Bing Liu ◽  
Gwynneth D. Offner ◽  
Frank G. Oppenheim ◽  
...  
Keyword(s):  
Salivary Glands ◽  
Expression Patterns ◽  
Cell Types ◽  
Mucous Cells ◽  
Electron Microscopic ◽  
Thin Sections ◽  
Dense Cores ◽  
Duct Cells ◽  
Rabbit Igg ◽  
Lowicryl K4m

The human salivary mucins MG1 and MG2 are well characterized biochemically and functionally. However, there is disagreement regarding their cellular and glandular sources. The aim of this study was to define the localization and distribution of these two mucins in human salivary glands using a postembedding immunogold labeling method. Normal salivary glands obtained at surgery were fixed in 3% paraformaldehyde-0.1% glutaraldehyde and embedded in Lowicryl K4M or LR Gold resin. Thin sections were labeled with rabbit antibodies to MG1 or to an N-terminal synthetic peptide of MG2, followed by gold-labeled goat anti-rabbit IgG. The granules of all mucous cells of the submandibular and sublingual glands were intensely reactive with anti-MG1. No reaction was detected in serous cells. With anti-MG2, the granules of both mucous and serous cells showed reactivity. The labeling was variable in both cell types, with mucous cells exhibiting a stronger reaction in some glands and serous cells in others. In serous granules, the electron-lucent regions were more reactive than the dense cores. Intercalated duct cells near the acini displayed both MG1 and MG2 reactivity in their apical granules. In addition, the basal and lateral membranes of intercalated duct cells were labeled with anti-MG2. These results confirm those of earlier studies on MG1 localization in mucous cells and suggest that MG2 is produced by both mucous and serous cells. They also indicate differences in protein expression patterns among salivary serous cells.

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