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Applied Immunohistochemistry & Molecular Morphology: AIMM

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https://www.readbyqxmd.com/read/28248732/the-role-of-mutation-rates-of-gnaq-or-gna11-in-cases-of-uveal-melanoma-in-japan
#1
Jun Ominato, Takeo Fukuchi, Ayako Sato, Naoyuki Yamaguchi, Kazue Kobayashi, Hiroyuki Cho, Tokuhide Oyama, Yoichi Ajioka
GNAQ and GNA11 mutations are thought to be important for the tumorigenesis of uveal melanoma. Although previous studies have reported on mutation rates in cases of uveal melanoma, presently, no such report for the Japanese population exists. In this study, we examined the frequency of GNAQ and GNA11 somatic mutations in cases of uveal melanoma in Japan and their relationship with clinicopathologic features or Ki-67-positive cell rates (Ki-67 labeling index: Ki-67 LI) using immunofluorescence methods. The study involved 19 cases of uveal melanoma...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28248731/aberrant-cytokeratin-20-reactivity-in-epithelioid-malignant-mesothelioma-a-case-report
#2
Rashmi Manur, Ihab Lamzabi
Malignant mesothelioma is an uncommon neoplasm that should be distinguished from the more common pulmonary adenocarcinomas and other metastatic lesions. Although diagnosis is based on morphologic features, immunohistochemical stains such as Calretinin, WT-1, CK-5/6, D2-40, Ber-Ep4, and MOC-31 are routinely used. Other organ-specific immunohistochemical markers are used when metastases from unknown primary lesion is suspected clinically. Here, we report a case of pleural epithelioid malignant mesothelioma expressing CK20...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28248730/distribution-of-rank-and-rank-ligand-in-normal-human-tissues-as-determined-by-an-optimized-immunohistochemical-method
#3
Clive R Taylor, Daniel Branstetter, Edward Manna, William C Dougall, Jeanine Bussiere, Carol W Johnson
The expression and tissue distribution of RANK (Receptor Activator of Nuclear Factor κ B) and RANK Ligand (RANKL) are of critical interest in relation to efficacy and safety of antibodies against RANK or RANKL that are approved or under consideration as potential therapeutic agents. Data from the literature using protein or mRNA analyses of rodent and human tissues or immunohistochemical (IHC) studies with a variety of antibodies and methods have provided some background of the distribution of RANK and RANKL but have yielded inconsistent findings...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28248729/virtual-double-staining-a-digital-approach-to-immunohistochemical-quantification-of-estrogen-receptor-protein-in-breast-carcinoma-specimens
#4
Nina Lykkegaard Andersen, Anja Brügmann, Giedrius Lelkaitis, Søren Nielsen, Michael Friis Lippert, Mogens Vyberg
Visual assessment of immunohistochemically detected estrogen receptor protein is prone to interobserver and intraobserver variation due to its subjective evaluation. The aim of this study was to validate a new image analysis system based on virtual double staining (VDS) by comparing visual and automated scorings of ER in tissue microarrays of breast carcinomas. Tissue microarrays were constructed of 112 consecutive resection specimens of breast carcinomas. Immunohistochemistry assays for ER and pancytokeratin was applied on separate serial sections...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28248728/clinicopathologic-features-of-the-non-cns-primary-ewing-sarcoma-family-of-tumors-in-the-head-and-neck-region
#5
Chang Gok Woo, Bora Lee, Joon Seon Song, Kyung-Ja Cho
Ewing sarcoma family of tumor (ESFT) is a group of malignant neoplasms that affect children and young adults. Primary ESFT does not commonly arise from the head and neck region. This study aimed to elucidate the clinicopathologic characteristics of ESFT of the head and neck region except for central nervous system primitive neuroectodermal tumors. Among the 207 cases of ESFT of the bone and soft tissue, diagnosed at Asan Medical Center during a 20-year period, 25 (12.1%) involved the head and neck region. Of those, 21 were available for histologic, immunohistochemical, and molecular studies...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28248727/interleukin-il-1-4-6-7-8-10-appearance-in-congenital-intra-abdominal-adhesions-in-children-under-1-year-of-age
#6
Anna Junga, Māra Pilmane, Zane Ābola, Olafs Volrāts
Several cytokines have been studied for their potential role in adhesion formation. Regulatory role between the cytokine pathways has not yet to be defined. This study was designed to investigate the relation between proinflammatory and anti-inflammatory cytokines in congenital intra-abdominal adhesions. Tissue samples used for research were obtained from abdominal surgery due to obstructive gut malrotation and several additional pathologies (rectal atresia without perforation, omphalocele). All tissue specimens were stained with hematoxylin and eosin and by immunohistochemistry for interleukin-1 (IL-1), IL-4, IL-6, IL-7, IL-8, and IL-10...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28248726/pax8-positive-biphasic-synovial-sarcoma-expressing-hormonal-receptors
#7
Leonardo Lordello, Martin E Bur, Esther Oliva, Jochen K Lennerz
PAX8, estrogen receptor-α (ERα) and progesterone receptor (PR) are markers usually expressed in neoplasms of müllerian origin. We report a subdiaphragmal mass in a 41-year-old woman corresponding to a malignant biphasic tumor with nests of epithelial-like cells forming variably sized cyst-like spaces alternating with spindle cells forming intersecting fascicles. The later were juxtaposed to coalescent densely cellular nodules of spindle cells with appreciable cytologic atypia and mitotic counts up to 30/10 high-power fields...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28248725/3d-tissue-microarray-controls-a-potential-standardization-solution
#8
Charles W Myers, Sonal Bhimji-Patel, Mark Rees, Syed Ashraf Imam, Cynthia Cohen
The use of controls is a hallmark for quality control in anatomic pathology. However, standardization of controls between laboratories has been a significant issue. Differential processing techniques between institutions and a multitude of preanalytical difficulties can result in different immunostain intensities. So called histoid controls, xenografts or culture cell lines, have been discussed in the past but with no recent followup. Herein is presented a histoid termed a 3D tissue microarray control (3D TMAC) control to help alleviate the burgeoning need for control standardization...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28248724/tle-1-positive-angiomatoid-fibrous-histiocytoma-mimicking-synovial-sarcoma
#9
Daniel J Zaccarini, Rana Naous, Yesha Sheth, Ola El-Zammar, Gustavo de la Roza, Christopher M Curtiss
Angiomatoid fibrous histiocytoma (AFH) is a rare soft tissue tumor most commonly seen in young adults and children. We report a case with morphology and immunohistochemistry supporting the diagnosis of synovial sarcoma. On core biopsy, the tumor had spindle cell and epithelioid morphology with a myxoid background. Staining for transducin-like enhancer of split 1 and CD99 were positive; however, subsequent fluorescence in situ hybridization for SYT (SS18, nBAF chromatin remodeling complex subunit) break apart returned negative...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28248723/performance-assessment-of-epidermal-growth-factor-receptor-gene-sequencing-according-to-sample-size-in-daily-practice-conditions
#10
Alejandro García, Constanza Lorente, María T Cuello, Mariana Dos Santos, Boris Elsner, Alejandra Avagnina, Valeria Denninghoff
Lung carcinoma is the main cause of cancer death worldwide. Adenocarcinoma molecular biomarkers have been discovered, and targeted therapies have been developed with encouraging results. The epidermal growth factor receptor gene is one of these biomarkers. Exons 18 to 21 should be studied in patients with advanced adenocarcinoma, who are candidates for treatment with tyrosine kinase inhibitors. The objective was to compare the performance of the determination in large and small samples in daily practice conditions, trying to adjust to published consensus guidelines...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28187037/incidental-finding-of-granular-cell-tumor-in-the-ileocecal-valve-during-colectomy-for-adenocarcinoma
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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