histological variants
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2021 ◽  
Vol 29 (01) ◽  
pp. 94-100
Author(s):  
Hina Wasti ◽  
Beenish Hussain Nomani ◽  
Sehrish Shafique ◽  
Yumna Shahid ◽  
Hira Faisal

Objective: To assess the expression of KRAS in tissue samples of colorectal carcinoma and to correlate it with histopathological parameters. Study Design: Cross Sectional study. Setting: Department of Pathology, PNS Shifa Hospital Karachi. Period: March 2016 to February 2019. Material & Methods: A total of 51 cases of CRC were analyzed for immunohistochemical staining using KRAS antibody on representative tissue blocks. Clinical and pathological records were retrieved for collection of data. The results of immunohistochemical analysis were correlated with the recorded clinico-pathological parameters. Results: In this study 51 cases of CRC were analyzed for immunoexpression of KRAS. The age of the patients ranged from 14 to 85 years with the mean age of 60.96 years. Among the 51 cases, 37(72.5%) cases were males and 14(27.4%) were females. 37(72.5%) were localized to left side colon and 14(27.4%) were found in the right colon. For KRAS immunostaining, 41(80.3%) out of 51 cases showed overexpression. Significant association was seen between KRAS overexpression and histological variants i.e. glandular carcinomas. Conclusion: In the present study over expression of KRAS was observed in advanced tumors. Majority of these cases were adenocarcinomas with few showed mucinous histology. The present study signifies that established KRAS expression is usually seen in rapidly dividing cells with association of advanced tumors.


2021 ◽  
Vol 66 (4) ◽  
pp. 567-579
Author(s):  
I. A. Shupletsova ◽  
A. M. Kovrigina

Introduction. Epstein — Barr virus (EBV) plays an important role in the pathogenesis of lymphoid tumors, in particular Hodgkin lymphoma. The frequency of expression of the EBV varies in different histological variants of classical Hodgkin lymphoma and is rarely observed in nodular lymphocyte predominant Hodgkin lymphoma.Aim — to study the pathomorphological features of the histological variants of Hodgkin lymphoma with lymphoid predominance associated with the EBV, as well as the frequency of their diagnosis in the structure of Hodgkin lymphoma.Materials and methods. The retrospective study included 794 patients with a verified diagnosis of Hodgkin lymphoma using histological and immunohistochemical methods on biopsy material for the period 2018–2019 (age range — 18–91 years old; median — 34 years old; men : women — 1.1 : 1). The presence of EBV in biopsies was assessed by immunohistochemical reaction with antibodies to EBV (clone LMP1), or by chromogenic in situ hybridization with probes for EBV-encoded small RNAs.Results. Classical Hodgkin lymphoma was diagnosed in 91 % (725/794) cases, nodular lymphocyte predominant Hodgkin lymphoma — in 9 % (69/794) cases. EBV-positive Hodgkin lymphoma accounted for 11 % (82/725) of all cases of classical Hodgkin lymphoma, (age range — 18–81 years old, median — 45 years old; men : women — 2.5 : 1). All cases of nodular lymphocyte predominant Hodgkin lymphoma were EBV-negative. Lymphocyte-rich classical Hodgkin lymphoma was found in 14 patients (14/725, 2 %), 4 patients showed intermediate morphoimmunohistochemical features with nodular lymphocyte predominant Hodgkin lymphoma, which were statistically significantly different from classical Hodgkin lymphoma by the presence of B-zones in the form of large nodules (p = 0.0157) and expression CD20 by tumor cells (p = 0.0404).Conclusion. Nodular lymphocyte predominant Hodgkin lymphoma is not characterized by a connection with EBV infection, unlike classical variant — lymphocyte-rich classical Hodgkin lymphoma. The obtained data support the concept of the existence of a transient form of Hodgkin lymphoma, which has the features of nodular lymphocyte predominant Hodgkin lymphoma and classical Hodgkin lymphoma, in the pathogenesis of which the Epstein — Barr virus likely plays a role. 


2021 ◽  
Vol 38 (1) ◽  
Author(s):  
Farah Farhan ◽  
Zainab Niazi ◽  
Sana Masood ◽  
Beenish Abbas

Background & Objective: Ameloblastomas have been analyzed histologically for diagnostics and its sub-classification; however, the analysis carried out so far does not provide any authentic evidence regarding prognosis of Ameloblastoma. Subject categorization is still a topic of debate. The purpose of this study was to determine the immuno-expression of markers such as MMP-9 and E-Cadherin in different sub-types of ameloblastoma and establish their correlation with histological variants. Methods: Analytical study of 71 cases of ameloblastoma was conducted in AFIP Rawalpindi, between January to June, 2019. Samples were taken from different intraoral sites including the patients with tumor of ameloblast. The tumor was sub classified histologically on the basis of WHO classification. ‘Chi Square’ Test was applied to find the association of MMP-9 and E-Cadherin with histological variants of ameloblastoma. P-value ≤ 0.05 were found statistically significant. Results: On histopathological sub-classification, 52.1% were diagnosed as follicular type, 23.9% were plexiform type, 14.1% were Acanthomatous type and 9.9% were of unicystic ameloblastoma. 80% of the total Acanthomatous type and 59% of the total plexiform had strong immuno-expression, which was significantly different from follicular type MMP-9 (p ≤ 0.05). All cases of unicystic ameloblastoma and 67.6% of follicular type showed strong immuno-expression significantly different from 20% of Acanthomatous type and 59% of plexiform type E-Cadherin (p ≥ 0.05). On the other hand, when statistical analysis was carried out, an inverse relation between MMP-9 and E-cadherin was observed. Conclusion: The effect of MMP-9 and E-cadherin in ameloblastoma is aggressive in nature and effectiveness was seen in subtypes of ameloblastoma. doi: https://doi.org/10.12669/pjms.38.1.4465 How to cite this:Farhan F, Niazi Z, Masood S, Abbas B. Immunohistochemical Expression of MMP-9 and E-Cadherin in subtypes of Ameloblastoma. Pak J Med Sci. 2022;38(1):---------. doi: https://doi.org/10.12669/pjms.38.1.4465 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


2021 ◽  
Vol 33 ◽  
pp. S359
Author(s):  
S. Tappero ◽  
S. Parodi ◽  
G. Mantica ◽  
N.R. Suardi ◽  
M. Borghesi ◽  
...  

2021 ◽  
pp. 72-77
Author(s):  
M. N. Umarova ◽  
S. G. Umarzoda ◽  
Z. B. Akhmedova

Aim. The study of anamnestic and clinical-morphological features of the malignant ovarian tumors (MOT) course in children.Material and methods. Clinical and anamnestic features of 47 cases of MOT in children who received special treatment in the Department of pediatric oncology of the SI “Republican Oncological Scientific Center” for 2005- 2018 were compared. To identify clinical morphological features patients were divided into two groups according to histotypes “teratoblastoma” (17 patients) and “dysgerminoma” (25 patients). The study used anamnestic, physical, clinical-laboratory, sonography, morphological, statistical methods.Results and discussion. As a result of the study, it was found that the main complaints at admission were pain and palpable formation in the abdomen, which had dimensions of up to 10 cm in 19 (40.4%) cases, and in 28 (59.6%) cases - more than 10 cm. Ultrasound examination revealed a tumor-like formation of a heterogeneous/cystic structure, with dense walls, multiple chambers, with inclusions, tuberous, reaching significant sizes of 40-400 mm. The average values of the AFP onco-marker were 155 U/ml, Ca-125 - 87 U/ml, which exceeded the reference values. Dysgerminoma was found in more than half of cases - 25 (53.2%). There were no statistically significant differences in clinical and anamnestic measures between the different histological variants.Conclusion. Comparative analysis of peculiarities of the clinical-morphological course of MOT in children depending on histological type showed no statistically significant differences.


2021 ◽  
Author(s):  
Satsuki Nakano ◽  
Yoshihide Okumura ◽  
Takayuki Murase ◽  
Toshitaka Nagao ◽  
Kimihide Kusafuka ◽  
...  

2021 ◽  
pp. 1-7
Author(s):  
Sanjay S. Reddy ◽  
Maitham A. Moslim ◽  
Hailan Liu ◽  
Max Lefton ◽  
Karen Ruth ◽  
...  

Background: Ampullary carcinoma is rare with a more favourable prognosis compared to pancreatic ductal adenocarcinoma. The role of histological classification, including pancreatobiliary (PB) and intestinal (INT), on survival and recurrence outcomes in ampullary cancer is still debatable. Methods: 42 patients were identified between 1996-2010. Results: Nineteen classic pancreatoduodenectomies (PD) and 23 pylorus-preserving PDs were performed. Pathological review revealed 23, 18 and 1 patients with the PB, INT and mixed histology, respectively. Adjuvant chemoradiation (ACRT), chemotherapy, and radiation were given to 14 (33.3%), 4 (9.5%) and 2 (4.8%) patients, respectively. Recurrence-free survival (RFS) and overall survival (OS) from time of surgery were higher in the PB histological variant compared to INT (p=0.005 and 0.012, respectively). A landmark (LM) analysis found higher survival in the PB variant patients compared to INT (RFS p=0.023; OS p=0.048). There was no difference in RFS between both histological variants for patients who underwent surgery alone (p=0.42). However, the PB had higher RFS compared to the INT histology for patients who underwent ACRT (p=0.008). Conclusion: Ampullary carcinoma with PB histological variant was associated with significant survival benefit. The PB versus INT survival benefit was seen in the setting of ACRT, but not with surgery alone.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Valentina D. Yakushina ◽  
Vladimir V. Strelnikov ◽  
Alexander S. Tanas ◽  
Alexander V. Lavrov

AbstractThe main types of thyroid neoplasms, follicular adenoma (FA), follicular thyroid carcinoma (FTC), classical and follicular variants of papillary carcinoma (clPTC and fvPTC), and anaplastic thyroid carcinoma (ATC), differ in prognosis, progression rate and metastatic behaviour. Specific patterns of lncRNAs involved in the development of clinical and morphological features can be presumed. LncRNA landscapes within distinct benign and malignant histological variants of thyroid neoplasms were not investigated. The aim of the study was to discover long noncoding RNA landscapes common and specific to major benign and malignant histological subtypes of thyroid neoplasms. LncRNA expression in FA, FTC, fvPTC, clPTC and ATC was analysed with comprehensive microarray and RNA-Seq datasets. Putative biological functions were evaluated via enrichment analysis of coexpressed coding genes. In the results, lncRNAs common and specific to FTC, clPTC, fvPTC, and ATC were identified. The discovered lncRNAs are putatively involved in L1CAM interactions, namely, pre-mRNA processing (lncRNAs specific to FTC); PCP/CE and WNT pathways (lncRNAs specific to fvPTC); extracellular matrix organization (lncRNAs specific to clPTC); and the cell cycle (lncRNAs specific to ATC). Known oncogenic and suppressor lncRNAs (RMST, CRNDE, SLC26A4-AS1, NR2F1-AS1, and LINC00511) were aberrantly expressed in thyroid carcinomas. These findings enhance the understanding of lncRNAs in the development of subtype-specific features in thyroid cancer.


Author(s):  
Katia Ramos Moreira Leite ◽  
Leonardo Lima Borges ◽  
Leopoldo Ribeiro Filho ◽  
Daher Chade ◽  
Rafael Ferreira Coelho ◽  
...  

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