The largest database of trusted experimental protocols

Pathologists

Pathologists are medical professionals who specialize in the diagnosis and study of diseases through the examination of bodily fluids and tissues.
They play a crucial role in the healthcare system, providing essential information to clinicians for patient management and treatment.
Pathologists utilize a wide range of laboratory techniques, including microscopic analysis, chemical testing, and molecular diagnostics, to identify the presence, nature, and severity of various medical conditions.
Their expertise is instrumental in the accurate diagnosis and monitoring of a diverse range of diseases, from cancer and infectious disorders to genetic and metabolic abnomalities.
Pathologists' work is essential for advancing medical research, improving patient outcomes, and enhancing the overall quality of healthcare.

Most cited protocols related to «Pathologists»

Protocol full text hidden due to copyright restrictions

Open the protocol to access the free full text link

Publication 2015
Blindness Cells DNA Chips Ethics Committees, Research Exome Freezing Malignant Neoplasms Methylation MicroRNAs Microtubule-Associated Proteins Neoplasm Metastasis Neoplasms Pathologists Patients Prostate Prostate Cancer Prostatic Intraepithelial Neoplasias Protein Arrays Proteins RNA Degradation Seminal Vesicles System, Genitourinary Tissues
Representative tumor regions were annotated across all 312 H&E-stained slides by an experienced pathologist (MBL) using QuPath’s manual annotation tools. A script was then applied in batch to automatically identify and set the average background intensity for the red, green and blue channels of each image, which varied markedly according to the scanner used. A second script was then run over all images to apply QuPath’s SLIC superpixel segmentation command to subdivide each annotated region into ‘superpixels’ based upon simple linear iterative clustering33 (link). This script additionally calculated both the average hue for each superpixel along with Haralick texture features34 from optical density values using QuPath’s Add intensity features command. QuPath’s Add smoothed features command was also applied to calculate a Gaussian-weighted sum of the features of neighboring superpixels, and append these to the existing features for each superpixel. This provide additional contextual information extending beyond the superpixel itself.
A subset of 40 ‘training’ images was then identified for the pathologist to interactively train a random trees classifier to distinguish between tissue areas comprising tumor epithelium, stroma and ‘other’ (e.g. whitespace, mucin, normal muscle or necrosis). This required drawing around regions containing tissue of each class and annotating these accordingly. During this process, QuPath used all available features to train the classifier in a background process and thereby provide immediate feedback on classification performance. Once the classification was considered adequate across the training images, the classifier was applied to all images within the set and the total area of superpixels for each class was exported. The tumor stromal percentage (TSP) was then calculated as TSP=AS/(AE+AS)×100%
where AS represents the total area classified as stroma, and AE represents the total area classified as epithelium.
Publication 2017
Epithelium Mucins Muscle Tissue Necrosis Neoplasms Pathologists Tissues Trees Vision
Articles were selected for inclusion in the systematic review of the evidence if they met the following criteria: (1) the study compared, prospectively or retrospectively, fluorescent ISH (FISH) and immunohistochemistry (IHC) results or other tests; described technical comparisons across various assay platforms; examined potential testing algorithms for HER2 testing; or examined the correlation of HER2 status in primary versus metastatic tumors from the same patients; (2) the study population consisted of patients with a diagnosis of invasive breast cancer; or (3) the primary outcomes included the negative predictive value (NPV) or positive predictive value (PPV) of ISH and IHC assays used to determine HER2 status, alone and in combination; negative and positive concordance across platforms; and accuracy in determining HER2 status and benefit from anti-HER2 therapy and in determining sensitivity and specificity of individual tests. Consideration was given to studies that directly compared results across assay platforms.
Studies were not limited to randomized controlled trials but also included other study types, including cohort designs, case series, evaluation studies, and comparative studies. The Update Committee also reviewed other testing guidelines and proficiency strategies of various US and international organizations, including unpublished data. Letters, commentaries, and editorials were reviewed for any new information. Case reports were excluded. The clinical questions addressed in the update are available in Data Supplement 5.
This information was used to help the Update Committee develop new algorithms (for pathologists and oncologists) for testing, specify testing requirements and exclusions, and facilitate the necessary quality assurance monitoring that will make HER2 testing less variable and ensure more analytic consistency between laboratories. The term ratio, as used in the guideline recommendations and algorithms, always applies to the HER2/CEP17 ratio, which means the ratio of HER2 signals per cell (numerator) over CEP17 signals per cell (denominator).
Publication 2013
Biological Assay Breast Carcinoma Dietary Supplements ERBB2 protein, human Immunohistochemistry Neoplasm Metastasis Oncologists Pathologists Patients Signal Transduction Therapeutics
Separate projects were initiated by individuals involved with this classification effort in an attempt to develop data to test the proposed system. These included projects on small biopsies,39 (link),40 (link) histologic grading,41 (link)–43 (link) stage I adenocarcinomas,44 small adenocarcinomas from Japan, international multiple pathologist project on reproducibility of recognizing major histologic patterns of lung adenocarcinoma,45 molecular-histologic correlations, and radiologic-pathologic correlation focused on adenocarcinoma in situ (AIS), and minimally invasive adenocarcinoma (MIA).
The new proposals in this classification are based on the best available evidence at the time of writing this document. Nevertheless, because of the lack of universal diagnostic criteria in the literature, there is a need for future validation studies based on these standardized pathologic criteria with clinical, molecular, radiologic, and surgical correlations.
Publication 2011
Adenocarcinoma Adenocarcinoma in Situ Adenocarcinoma of Lung Biopsy Diagnosis Operative Surgical Procedures Pathologists
Cohort-1 hepatic tissues were obtained from the Liver Cancer Institute (LCI) with informed consent from patients who underwent radical resection between 2002 and 2003 at the Liver Cancer Institute and Zhongshan Hospital (Fudan University, Shanghai, China). The study was approved by the Institutional Review Board of the participating institutes. A total of 247 HCC patients were recruited. Cases were mainly from patients with a history of hepatitis B virus (HBV) infection or HBV-related liver cirrhosis; all were diagnosed with HCC by two independent pathologists, with detailed information on clinical presentation and pathological characteristics. For 242 patients, disease-free survival and overall survival as well as the cause of death were available.
The gene expression data of cohort-2 has been published earlier (20 (link), 21 (link)). Briefly, gene expression profiling of cohort-2 was performed by the Laboratory of Experimental Carcinogenesis (LEC) and analyzed using NCI’s Human Array-Ready Oligo Set microarray platform (GPL1528). The microarray data is publicly available at the Gene Expression Omnibus (GEO; http://www.ncbi.nlm.nih.gov/geo) with accession numbers GSE1898 and GSE4024.
Publication 2010
B virus, Hepatitis Cancer of Liver Carcinogenesis Ethics Committees, Research Gene Expression Homo sapiens Liver Cirrhosis Microarray Analysis Oligonucleotides Pathologists Patients Tissues

Most recents protocols related to «Pathologists»

The colonic segments were fixed in Methanol-Carnoy solution (methanol: chloroform: glacial acetic acid = 6:3:1), paraffin embedded and cut into serial 4 μm sections. Then, goblet cell staining was performed via Alcian blue/periodic acid-Schiff staining according to the instructions. The pathologist, without knowledge of any experimental procedures, counted the number of goblet cells.
Publication 2023
Acetic Acid Alcian Blue Chloroform Colon Goblet Cells methacarn Methanol Paraffin Pathologists Periodic Acid
The distal colon specimens were fixed with 4% paraformaldehyde for 24 h and embedded in paraffin. Then, paraffin-embedded colonic tissues were sectioned (4 μm in thickness), stained with hematoxylin and eosin, and analyzed by a pathologist without information on the experimental procedures based on the scoring criteria as described previously [19 (link)].
Publication 2023
Colon Eosin Paraffin Paraffin Embedding paraform Pathologists Tissues
Seven tissue samples from of SCC and seven samples of healthy cervical tissue were used for microarray testing. Additionally, cervical tissue samples from 11 cases of chronic cervicitis, 16 cases of low-grade squamous intraepithelial lesion (LSIL), 20 cases of high-grade squamous intraepithelial lesion (HSIL), and 21 cases of cervical cancer were used to detect hsa_circ_0000276 expression. All samples were single HPV16-positive. From January 2019 to January 2022, samples were obtained from patients who underwent colposcopy at the Second Hospital of the Shanxi Medical University. The tissue specimens were independently diagnosed by two experienced clinical pathologists.
The inclusion criteria were as follows: (i) married women aged ≤ 65 years; (ii) residents of Taiyuan for > 1 year; and (iii) written informed consent provided. The exclusion criteria were as follows: (i) pregnant women; (ii) a history of hysterectomy; (iii) a history of treatment of cervical and vaginal diseases; and (iv) presence of other malignant tumors. Written informed consent was obtained from all study participants or their legal guardians. The Ethics Review Committee of the Second Hospital of the Shanxi Medical University approved this study [approval number (2019) YX No. (280)].
The operational protocol for cervical tissue collection was as follows. The doctor who performed the examination had > 2 years of experience. The lesion site was assessed, and if cervical cancer was considered, tissue was collected from: (1) the cancer site (two pieces of tissue [each approximately 5 mm in size] were clamped) and (2) the matching normal tissues (two pieces of tissues [each approximately 5 mm in size] were clamped at approximately 3–5 cm from the cancer site). After clamping, the tissues were placed in 10% neutral formalin for 6–12 h for fixation and processed within 24 h for routine pathological examination. The tissues were then collected in pre-cooled tubes and quickly snap frozen in liquid nitrogen.
Publication 2023
Cervical Cancer Colposcopy Formalin Freezing High-Grade Squamous Intraepithelial Lesions Human papillomavirus 16 Hysterectomy Legal Guardians Low-Grade Squamous Intraepithelial Lesions Malignant Neoplasms Microarray Analysis Neck Nitrogen Pathologists Patients Physicians Pregnant Women Tissues Uterine Cervicitis Vaginal Diseases Woman
For the present retrospective analyses, we used data from the four clinical cancer registries in Saxony, Germany. This study does not include data of a clinical trial. In Germany, all inpatient and outpatient physicians as well as pathologists are obliged to report information on diagnosis, histological results, treatment and outcomes to the clinical cancer registries. Patients need to be informed about this process. Consent is not required but, patients have a right of objection, which is hardly used (fewer than five cases/year in Saxony). After documentation and validation of the data, analyses are conducted with an anonymized data set that does not allow identification of individual patients. Completeness of the registries has been estimated to be 98% across all tumors since 2007 [14 ].
All cases with ICD-10 diagnoses C18 (excluding C18.1), C19 and C20, histologically verified adenocarcinoma and tumor-specific surgery in Saxony in the years 2010 to 2020 were included (n = 25,812). Patients had to be at least 18 years old and have their main residence in Saxony at the time of diagnosis (n = 24,306). We excluded 221 cases with missing information on UICC tumor stage. Thus, the final analytical sample comprised 24,085 cases (Fig. 1).

Flowchart of data collection, inclusion criteria and patient selection

Abbreviations: UICC, Union for International Cancer Control.

Publication 2023
Adenocarcinoma Diagnosis Inpatient Malignant Neoplasms Neoplasms Operative Surgical Procedures Outpatients Pathologists Patients Physicians
We selected three key proteins of the PI3K-Akt signaling pathway, including ErbB2, PIK3R1, and AKT3, to verify the pathway predictions. After dewaxing, the sections were subjected to antigen retrieval at high temperature and pressure for 3 min, washed with water, incubated with 3% hydrogen peroxide at room temperature for 10 min, washed again three times, and then placed in phosphate-buffered saline solution. We blocked the sections with 5% fetal bovine serum for 30 min, then added the first antibody for overnight incubation at 4 °C. The next day, the sections were washed three times, then incubated with a secondary antibody at room temperature for 30 min and washed three times. We then incubated the sections for 1–3 min with diaminobenzidine chromogenic solution, lightly stained the nuclei with hematoxylin, and differentiated the sections with 0.5% hydrochloric acid ethanol for 2 s. After three washes, the sections were dehydrated with graded alcohol, made transparent, and sealed with neutral gum. The antibodies used in the study were raised against CgA (dilution 1:1000, GT211407; Gene Tech, CHINA), SYP (dilution 1:1000, GT206507; Gene Tech), ErbB2 (dilution 1:1000, GT224507; Gene Tech), PIK3R1 (dilution 1:1000, ER64588; HUABIO), and AKT3 (dilution 1:1000, ER62638; HUABIO).
Based on the 2010 World Health Organization classification system, we examined two neuroendocrine biomarkers, CgA and SYP. Specimens in which CgA and/or SYP were present in 2–30% of immunoreactive cells were classified as NED [1 (link)]. All immunohistochemical sections were evaluated by two senior pathologists.
Publication 2023
AKT3 protein, human Antibodies Antigens azo rubin S Biological Markers Cell Nucleus Cells ERBB2 protein, human Ethanol Fetal Bovine Serum Fever Genes Hematoxylin Hydrochloric acid Immunoglobulins Neurosecretory Systems Pathologists Peroxide, Hydrogen Phosphates Phosphatidylinositol 3-Kinases Pressure Proteins Saline Solution Signal Transduction Technique, Dilution

Top products related to «Pathologists»

Sourced in United States, Switzerland, Azerbaijan, Germany, France, Denmark, United Kingdom, China, Belgium
The BenchMark XT is a fully automated, open-architecture immunohistochemistry (IHC) and in situ hybridization (ISH) system designed for routine and advanced research applications. The system provides consistent, reliable, and high-quality results by automating the entire staining process, from slide preparation to staining, washing, and detection.
Sourced in Germany, United States, United Kingdom, Netherlands, Japan, Spain, China, Italy, France, Australia, Canada
The QIAamp DNA FFPE Tissue Kit is a laboratory equipment designed for the purification of DNA from formalin-fixed, paraffin-embedded (FFPE) tissue samples. It is used to extract high-quality genomic DNA from FFPE samples for downstream applications such as PCR, sequencing, and other molecular biology techniques.
Sourced in Japan, United States, Germany, Italy, Denmark, United Kingdom, Canada, France, China, Australia, Austria, Portugal, Belgium, Panama, Spain, Switzerland, Sweden, Poland
The BX51 microscope is an optical microscope designed for a variety of laboratory applications. It features a modular design and offers various illumination and observation methods to accommodate different sample types and research needs.
Sourced in United States, China, United Kingdom, Germany, Australia, Japan, Canada, Italy, France, Switzerland, New Zealand, Brazil, Belgium, India, Spain, Israel, Austria, Poland, Ireland, Sweden, Macao, Netherlands, Denmark, Cameroon, Singapore, Portugal, Argentina, Holy See (Vatican City State), Morocco, Uruguay, Mexico, Thailand, Sao Tome and Principe, Hungary, Panama, Hong Kong, Norway, United Arab Emirates, Czechia, Russian Federation, Chile, Moldova, Republic of, Gabon, Palestine, State of, Saudi Arabia, Senegal
Fetal Bovine Serum (FBS) is a cell culture supplement derived from the blood of bovine fetuses. FBS provides a source of proteins, growth factors, and other components that support the growth and maintenance of various cell types in in vitro cell culture applications.
Sourced in United States, Japan, Germany, United Kingdom, China, Hungary, Singapore, Canada, Switzerland
Image-Pro Plus 6.0 is a comprehensive image analysis software package designed for scientific and industrial applications. It provides a wide range of tools for image capture, enhancement, measurement, analysis, and reporting.
Sourced in United States, Switzerland, Germany, Azerbaijan, United Kingdom, Italy, France, Denmark, Japan
The Benchmark Ultra is a versatile lab equipment product designed for various applications. It features precise temperature control, reliable performance, and user-friendly operation. The core function of the Benchmark Ultra is to provide a consistent and accurate environment for scientific experiments and testing.
Sourced in Germany, United States, France, United Kingdom, Netherlands, Spain, Japan, China, Italy, Canada, Switzerland, Australia, Sweden, India, Belgium, Brazil, Denmark
The QIAamp DNA Mini Kit is a laboratory equipment product designed for the purification of genomic DNA from a variety of sample types. It utilizes a silica-membrane-based technology to efficiently capture and purify DNA, which can then be used for various downstream applications.
Sourced in Japan, United States, Germany, Canada, United Kingdom, Spain, Australia, Belgium, Hungary, Switzerland, Denmark, France, China
The BX41 is an upright microscope designed for routine laboratory applications. It features a high-intensity LED illumination system and a sturdy, ergonomic design.
Sourced in Germany, United States, Netherlands, United Kingdom, Japan, Canada, Spain, Italy, France, China, Sweden
The RNeasy FFPE Kit is a laboratory product designed for the purification of total RNA from formalin-fixed, paraffin-embedded (FFPE) tissue samples. It provides a reliable method for extracting high-quality RNA from challenging FFPE samples.
Sourced in United States, United Kingdom, Germany, Japan, Lithuania, Italy, Australia, Canada, Denmark, China, New Zealand, Spain, Belgium, France, Sweden, Switzerland, Brazil, Austria, Ireland, India, Netherlands, Portugal, Jamaica
RNAlater is a RNA stabilization solution developed by Thermo Fisher Scientific. It is designed to protect RNA from degradation during sample collection, storage, and transportation. RNAlater stabilizes the RNA in tissues and cells, allowing for efficient RNA extraction and analysis.

More about "Pathologists"

Pathologists are medical professionals who specialize in the diagnosis and study of diseases through the examination of bodily fluids and tissues.
They are also known as medical laboratory scientists, clinical pathologists, or anatomical pathologists.
These experts play a crucial role in the healthcare system, providing essential information to clinicians for patient management and treatment.
Pathologists utilize a wide range of laboratory techniques, including microscopic analysis, chemical testing, and molecular diagnostics, to identify the presence, nature, and severity of various medical conditions.
Their expertise is instrumental in the accurate diagnosis and monitoring of a diverse range of diseases, from cancer and infectious disorders to genetic and metabolic abnormalities.
The work of pathologists is essential for advancing medical research, improving patient outcomes, and enhancing the overall quality of healthcare.
They may use specialized equipment and kits, such as the BenchMark XT, QIAamp DNA FFPE Tissue Kit, BX51 microscope, FBS, Image-Pro Plus 6.0, Benchmark Ultra, QIAamp DNA Mini Kit, BX41 microscope, RNeasy FFPE Kit, and RNAlater, to support their diagnostic and research activities.
Pathologists play a vital role in the healthcare system, contributing their expertise and utilizing advanced techniques to provide accurate and timely diagnoses, which are crucial for effective patient treatment and management.
Their work is instrumental in advancing medical knowledge and improving patient outcomes.