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Applied Immunohistochemistry & Molecular Morphology: AIMM

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https://www.readbyqxmd.com/read/28187037/incidental-finding-of-granular-cell-tumor-in-the-ileocecal-valve-during-colectomy-for-adenocarcinoma
#1
Anaïs Dziegielewski, Maxime Hamon, Najat Mourra
No abstract text is available yet for this article.
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28187036/a-brief-report-of-immunohistochemical-markers-to-identify-aggressive-hepatoblastoma
#2
Vivekanand Singh, Michelle Manalang, Meenal Singh, Udayan Apte
Hepatoblastoma (HB) is the most common malignant liver tumor in children. Although survival of patients has improved significantly over the last 2 decades, a significant number of patients do not respond to standard chemotherapy. We conducted a pilot study to understand if there was immunophenotypic difference between tumors that respond well to chemotherapy versus that do not. We selected 10 cases of HB from children presenting at our hospital. All patients had initial tissue diagnosis, underwent chemotherapy followed by surgical resection...
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28187035/hepatocyte-antigen-expression-in-barrett-esophagus-and-associated-neoplasia
#3
Sejal S Shah, Vishal S Chandan
Hepatocyte antigen or hepatocyte paraffin 1 (Hep Par 1) is widely used as a diagnostic immunomarker for hepatocellular carcinoma. It has also been identified as a rate-limiting enzyme of the urea cycle, carbamoyl phosphate synthetase 1. Hep Par 1 has been detected in non-neoplastic small intestinal epithelium, but its expression in Barrett esophagus and its related neoplasia has not been well investigated. We immunohistochemically evaluated expression of Hep Par 1 on 75 cases of Barrett esophagus (25 cases without dysplasia, 16 cases with low-grade dysplasia, 25 cases with high-grade dysplasia, and 9 cases with intramucosal adenocarcinoma) on endoscopic biopsies and endoscopic mucosal resections...
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28187034/detection-of-novel-t-12-17-p12-p13-in-relapsed-refractory-acute-myeloid-leukemia-by-anchored-multiplex-pcr-amp-based-next-generation-sequencing
#4
Talha Badar, Laura Johnson, Katelyn Trifilo, Helen Wang, Brian A Kudlow, Eric Padron, Peter R Pappenhausen, Mohammad O Hussaini
Although several technologies can be used to detect gene fusions, anchored multiplex PCR next-generation sequencing (AMP-NGS) offers the advantage of novel fusion detection and the ability to multiplex multitudinous genes. We applied AMP-NGS technology in the evaluation of a 56-year-old gentleman with myelodysplastic syndrome transformed acute myeloid leukemia (AML). Patient was initially diagnosed with low-risk myelodysplastic syndrome-refractory cytopenias and multilineage dysplasia (MDS-RCMD), progressed to AML after failing hypomethylating agent therapy...
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28187033/prognostic-significance-of-stromal-versus-intratumoral-infiltrating-lymphocytes-in-different-subtypes-of-breast-cancer-treated-with-cytotoxic-neoadjuvant-chemotherapy
#5
Thaer Khoury, Vidya Nagrale, Mateusz Opyrchal, Xuan Peng, Dan Wang, Song Yao
BACKGROUND: The aim of the study was to investigate if there were differences in associations of stromal versus intratumoral tumor infiltrating lymphocytes (TILs) with pathology complete response (pCR) among breast cancer (BC) subtypes treated with neoadjuvant therapy. MATERIALS AND METHODS: The hematoxylin and eosin slides of BC-core biopsy consecutive cases (n=331) were reviewed from a single institution between 2000 and 2014. TIL-stroma (TIL-str) was scored from 0% to 100%...
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28187032/immunohistochemical-detection-of-hematopoietic-cell-specific-protein-tyrosine-phosphatase-tyrosine-phosphatase-shp-1-in-a-series-of-endometrioid-and-serous-endometrial-carcinoma
#6
Giovanna Giordano, Nicoletta Campanini, Matteo Goldoni, Anna M Rodolfi, Francesca Brigati, Carla Merisio, Roberto Berretta
In this study, we evaluated the expression of SHP-1 (PTPN6) in endometrioid (Ec) and serous (Sc) subtypes of endometrial carcinoma by immunohistochemical analysis. In total, 114 patients with Ec carcinoma and 48 patients with Sc carcinoma were enrolled in this study. The correlation between the type of histology, the grade of tumor, the stage of development, and immunoreactivity to SHP-1 was evaluated. Kaplan-Meier and multivariate survival analyses, using a Cox regression model, were performed to establish whether this marker has prognostic value in these malignancies, on the basis of follow-up and stratification of the patients according to their SHP-1 immunoreactivity...
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28187031/x-ray-of-excised-cancerous-breast-tissue-does-not-affect-clinical-biomarker-expression
#7
Isaac E Lloyd, Alana L Welm, Yoko DeRose, Leigh A Neumayer, Jessica L Kohan, Elisabeth M Malmberg, Mohamed E Salama, Rachel E Factor
CONTEXT: College of American Pathologists (CAP) and the American Society of Clinical Oncology have emphasized the need to reduce preanalytic variables for evaluating predictive biomarker expression in breast cancer. Postoperative x-ray of excised breast tissue is commonplace, yet is a variable that has not been investigated previously. We asked whether such radiation affects expression of relevant biomarkers. DESIGN: A previous study found that human breast cancers grown in mice demonstrate the same immunohistochemical and molecular profiles as the original tumors...
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28187030/evolution-of-quality-assurance-for-clinical-immunohistochemistry-in-the-era-of-precision-medicine-part-3-technical-validation-of-immunohistochemistry-ihc-assays-in-clinical-ihc-laboratories
#8
Emina E Torlakovic, Carol C Cheung, Corrado D'Arrigo, Manfred Dietel, Glenn D Francis, C Blake Gilks, Jacqueline A Hall, Jason L Hornick, Merdol Ibrahim, Antonio Marchetti, Keith Miller, J Han van Krieken, Soren Nielsen, Paul E Swanson, Mogens Vyberg, Xiaoge Zhou, Clive R Taylor
Validation of immunohistochemistry (IHC) assays is a subject that is of great importance to clinical practice as well as basic research and clinical trials. When applied to clinical practice and focused on patient safety, validation of IHC assays creates objective evidence that IHC assays used for patient care are "fit-for-purpose." Validation of IHC assays needs to be properly informed by and modeled to assess the purpose of the IHC assay, which will further determine what sphere of validation is required, as well as the scope, type, and tier of technical validation...
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28187029/androgen-receptor-ar-expression-in-invasive-male-breast-carcinoma-mbc-an-international-multi-institutional-review-of-168-cases-emphasizing-the-potential-use-of-ar-as-a-therapeutic-target
#9
Simona Stolnicu, Denisa Moncea, Alis Dema, Simion Geambasu, Cosmin Moldovan, Maria Comanescu, Septimiu Voidazan, Rares Georgescu, Isabel Alvarado-Cabrero, Erika Resetkova, Rares Buiga
No abstract text is available yet for this article.
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28151793/igg4-expression-in-primary-cutaneous-marginal-zone-lymphoma-a-multicenter-study
#10
Aieska De Souza, Judith A Ferry, Daniel R Burghart, Marianne Tinguely, Amrita Goyal, Lyn M Duncan, Heinz Kutzner, Werner Kempf
BACKGROUND: Primary cutaneous marginal zone lymphoma (PCMZL) is the second most common B-cell lymphoma of the skin. A recent study has demonstrated a strikingly high prevalence of immunoglobulin (Ig)G4 expression in PCMZL with plasmacytic differentiation. OBJECTIVE: The objective was to investigate the incidence of IgG4 expression in PCMZL, and its correlation with clinical and immunophenotypic features. MATERIALS AND METHODS: Multicenter study that utilized immunohistochemistry and in-situ hybridization to evaluate the expression of IgG4, Ig light (κ and λ), and heavy chains (IgM, IgG), and the ratio of T (CD3+) and B (CD20+) cells in biopsy specimens from 30 patients with PCMZL and to correlate these findings with the clinical features...
February 1, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28099174/discordance-rate-in-estrogen-receptor-progesterone-receptor-her2-status-and-ki67-index-between-primary-unifocal-and-multiple-homogenous-breast-carcinomas-and-synchronous-axillary-lymph-node-metastases-have-an-impact-on-therapeutic-decision
#11
Rares Georgescu, Monica Boros, Denisa Moncea, Orsolya Bauer, Marius-Florin Coros, Adela Oprea, Cosmin Moldovan, Cristian Podoleanu, Simona Stolnicu
BACKGROUND: We aimed to demonstrate that in breast carcinomas the tumor profile is not stable during the metastatic process, with impact on therapeutic decisions. MATERIALS AND METHODS: We analyzed the estrogen receptor (ER), progesterone receptor (PR), and HER2 status and Ki67 index in 41 primary unifocal (PU) and 37 primary multiple (PM) breast carcinomas with identical immunohistochemical profiles among multiple tumor foci and the matched axillary lymph node metastases...
January 17, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28059871/modified-nanoantibodies-increase-sensitivity-in-avidin-biotin-immunohistochemistry
#12
Anthony Wong, Chelsea Sykora, Lewis Rogers, Jennifer Higginbotham, Jiwu Wang
Revealing the spatial arrangement of molecules within a tissue through immunohistochemistry (IHC) is an invaluable tool in biomedical research and clinical diagnostics. Choosing both the appropriate antibody and amplification system is paramount to the pathologic interpretation of the tissue at hand. The use of single domain VHH nanoantibodies (nAbs) promise more robust and consistent results in IHC, but are rarely used as an alternative to conventional immunoglobulin G (IgG) antibodies. nAbs are originally obtained from llamas and are the smallest antigen-binding fragments available...
January 4, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28027119/comparison-of-%C3%AE-catenin-and-lef1-immunohistochemical-stains-in-desmoid-type-fibromatosis-and-its-selected-mimickers-with-unexpected-finding-of-lef1-positivity-in-scars
#13
Youran Zou, Yaxia Zhang, James Church, Xiuli Liu
β-catenin immunohistochemical stain can be useful in the diagnosis of many tumors including desmoid-type fibromatosis (DTF). Lymphoid enhancer-factor 1 (LEF1), a recently emerged marker, is part of the Wnt pathway with β-catenin but has not been studied in DTF. We performed LEF1 and β-catenin immunohistochemistry in DTF (n=26), superficial fibromatosis (n=19), sclerosing mesenteritis (n=12), gastrointestinal stromal tumor (n=17), and cutaneous scar (n=14) using tissue microarray and whole sections. The staining intensity was scored as strong (visible at ×2 objective, value of 3), moderate (visible at ×4, value of 2), weak (visible at ×10, value of 1), and negative (not visible at ×10, value of 0)...
December 23, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28027118/gain-of-tp53-mutation-in-imatinib-treated-sdh-deficient-gastrointestinal-stromal-tumor-and-clinical-utilization-of-targeted-next-generation-sequencing-panel-for-therapeutic-decision-support
#14
Christina H Wei, Jonas Pettersson, Mihaela Campan, Shefali Chopra, Wesley Naritoku, Sue E Martin, Pamela M Ward
Patients with succinate dehydrogenase (SDH)-deficient gastrointestinal stromal tumor (GIST) have few therapeutic options. Despite lack of KIT or platelet-derived growth factor receptor A (PDGFRA) driver mutations, SDH-deficient GISTs display strong expression of KIT by immunohistochemistry and these patients are often treated with tyrosine kinase inhibitors, including imatinib as a first-line therapy. Using a targeted next-generation sequencing panel of mutation hotspots of 50-clinically relevant genes, we investigated (1) concurrence of somatic/actionable mutations and (2) tumor molecular evolution by comparing 2 resection specimens 1...
December 23, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28027117/precision-medicine-starts-with-preanalytics-real-time-assessment-of-tissue-fixation-quality-by-ultrasound-time-of-flight-analysis
#15
Melissa L Lerch, Daniel R Bauer, David Chafin, Abbey Theiss, Michael Otter, Geoffrey S Baird
Personalized medicine promises diagnosis and treatment of disease at the individual level and relies heavily on clinical specimen integrity and diagnostic assay quality. Preanalytics, the collection and handling steps of a clinical specimen before immunohistochemistry or other clinical assay, are critically important to enable the correct diagnosis of disease. However, the effects of preanalytics are often overlooked due to a lack of standardization and limited assessment tools to quantify their variation. Here, we report a novel real-time ultrasound time-of-flight instrument that is capable of monitoring and imaging the critical step in formalin fixation, diffusion of the fixative into tissue, which provides a quantifiable quality metric for tissue fixation in the clinical laboratory ensuring consistent downstream molecular assay results...
December 23, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27997502/mitotic-index-determined-by-phosphohistone-h3-immunohistochemistry-for-precise-grading-in-follicular-lymphoma
#16
Judit Bedekovics, Gábor Irsai, Katalin Hegyi, Lívia Beke, László Krenács, Lajos Gergely, Gábor Méhes
The World Health Organization classification recommends follicular lymphoma (FL) grading (G1-3) by considering centroblast number, while also suggesting its influence on disease outcome. As centroblast counting and other proliferation markers have limitations, we looked for more specific measures of cellular activity in FL. Phosphorylated histone H3 (pHH3) was widely applied for the objective detection of mitotic activity in different tumors. The aim was to evaluate the utility of pHH3 protein in FL grading and compare its value with the classical features of cell proliferation...
December 16, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27941568/the-family-of-%C3%AE-catenin-ovarian-tumors
#17
Maria C Mengoli, Riccardo Valli, Gian F Zannoni
No abstract text is available yet for this article.
December 9, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27941567/a-serous-peritoneal-cancer-revealing-itself-with-double-breast-cancer-metastases-in-2-different-periods
#18
Kemal Beksac, Cigdem Irkkan, Guldeniz Argun, Bahadir Cetin
A 72-year-old woman presented with a mass on the right axilla. This was thought to be an occult breast cancer case, and the patient was treated with modified radical mastectomy, followed by hormonotherapy. Two years later she presented with incarcerated umbilical hernia. Pathology revealed Sister Mary Joseph's nodule inside the hernia sac. Further evaluation revealed that the primary tumor was papillary serous carcinoma of the peritoneal surface. The patient received adjuvant chemotherapy. Two years later the metastatic tumor was located on the other breast...
December 9, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27941566/folate-receptor-alpha-expression-in-platinum-resistant-refractory-ovarian-carcinomas-and-primary-endocervical-adenocarcinomas
#19
Lisa A Rubinsak, Cynthia Cohen, Namita Khanna, Ira R Horowitz, Krisztina Z Hanley
INTRODUCTION: Treatment of advanced stage ovarian carcinoma is challenging, and despite surgical treatment and chemotherapy, the 5-year survival rate is estimated around 30%. Early recurrence and resistance to platinum-based chemotherapy are associated with poor prognosis and limited response to available second-line chemotherapy. The relative incidence of endocervical adenocarcinoma (EAC) compared with squamous cell carcinoma is increasing. Although the first-line treatment modality for early stage EAC is surgical resection, for locally advanced disease chemoradiation or neoadjuvant chemotherapy is used...
December 9, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27941565/clinicopathologic-correlates-of-helicobacter-pylori-in-gastric-mucosa
#20
Neelam Wadhwa, Sanjay Gupta, Sarla Aggarwal, Kiran Mishra
No abstract text is available yet for this article.
December 9, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
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