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Applied Immunohistochemistry & Molecular Morphology: AIMM

Sarah Wedden, Keith Miller, Ian M Frayling, Teresa Thomas, Alina Chefani, Karolina Miller, Angela Hamblin, Jenny C Taylor, Corrado D'Arrigo
Colorectal cancer (CRC) has many subtypes with different prognoses and response to treatment. Patients must be characterized to access the most appropriate treatment and improve outcomes. An increasing number of biomarkers are required for characterization but are not in routine use. We investigated whether CRC can be stratified routinely within a small district general hospital to inform clinical decision making at local multidisciplinary team meeting/tumor board level. We evaluated mismatch repair (MMR) and EGFR signaling pathways using predominantly in-house immunohistochemical (IHC) tests (MSH2, MSH6, MLH1, PMS2, BRAF-V600E, Her2, PTEN, cMET) as well as send away PCR/NGS tests (NRAS, KRAS, and BRAF)...
July 5, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Kamaljeet Singh, Katrine Hansen, M Ruhul Quddus
No abstract text is available yet for this article.
June 15, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Minju Lee, So Young Kang, Yeon-Lim Suh
Epidermal growth factor receptor (EGFR) amplification is one of the common alterations in IDH-wildtype glioblastoma. It is frequently associated with EGFRvIII mutation. To evaluate the correlation between EGFR overexpression, gene amplification, and EGFRvIII mutation, we performed immunohistochemical (IHC) analysis, fluorescence in situ hybridization by Vysis LSI EGFR/CEP7 dual color probe, and polymerase chain reaction studies in 76 patients diagnosed with glioblastomas (67 IDH-wildtype and 9 IDH-mutant). EGFR expression was scored ranging from 0 to 3+...
June 15, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Carmen M Perrino, Jason A Orien, Jason G Tretter, Weiqiang Zhao, Debra L Zynger
Chromosome 3p deletion is a well-established genetic aberration in clear cell renal cell carcinoma (RCC). We aimed to evaluate the clinical utility of 3p fluorescence in situ hybridization (FISH) on formalin-fixed paraffin-embedded tissue in surgical pathology specimens. 3p:3q <0.8 was established as the cut-off for 3p loss. The 2015 Medicare allowable billing rates were used to estimate the cost. Over 2.5 years (2013 to 2015), 3p FISH was performed on 18 cases per year. Among tested cases, 70% (30/43) were nephrectomies and 30% (14/43) metastases...
June 15, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Yasmin Lundström, Patrik Lundström, Svetlana N Popova, Rickard P F Lindblom, Irina Alafuzoff
In this study, we have systematically assessed the influence of postmortem delay (PMD) and fixation time (FT) on the immunohistochemical (IHC) staining outcome. The IHC method is frequently applied on surgical and postmortem samples in diagnostics and research. To replicate the routine situation, brain tissues from pigs were exposed to either storage in a refrigerator (+8°C), that is, PMD (1 to 168 h), or fixed in 10% buffered formalin, that is, FT (18 to 94 d). Subsequently, the tissue was routinely processed into paraffin blocks to enable construction of tissue microarrays (TMA)...
June 15, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Omnia M Badawy, Hannan Hassan, Heba A ELBakey, Maha Mosaad
BACKGROUND: Breast cancer is a major health problem in Egypt. Her-2/Neu gene is routinely assessed for all breast cancer patients primarily by immunohistochemistry. At National Cancer Institute (NCI), Cairo University, Flourescence In Situ hybridization (FISH) analysis of Her-2/Neu gene is carried out for Her-2/Neu score 2 and for some cases of score 3 (particularly those assessed outside NCI). The test is performed essentially on the primary tumor. However, some situations require testing on corresponding lymph node metastases...
May 10, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Mojgan Alaeddini, Shahroo Etemad-Moghadam
Transforming growth factor-β has been implicated in the tumorigenesis of oral squamous cell carcinoma (OSCC). Ski and SnoN are negative regulators of transforming growth factor-β/Smad pathway with both prooncogenic and antioncogenic functions in different cancers. The aim of this study was to assess the expression of Ski and SnoN in OSCC for the first time. Smad4 was also evaluated in these tumors. Clinical data on 61 primary OSCCs were gathered, and the specimens were subjected to immunohistochemical staining with monoclonal antibodies against SKI, SnoN, and Smad4 and scored semiquantitatively...
May 4, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Vaishali Aggarwal, Ashim Das, Amanjit Bal, Radhika Srinivasan, Reena Das, Gaurav Prakash, Pankaj Malhotra, Subhash Varma
Diffuse large B-cell lymphoma (DLBCL) has a heterogenous biological behavior, and the western literature has reported activating oncogenic mutations in myeloid differentiation primary response gene 88 (MYD88), in conjunction with B-cell receptor signaling pathway genes, CARD11 and CD79B as the driving force for activating the NF-κB pathway implicated in the pathogenesis of DLBCL. The mutation profile of MYD88 genes was evaluated by Sanger sequencing in a cohort of 97 patients [DLBCL (N=55), non-DLBCL lymphomas (N=30), reactive lymphadenopathy (N=10), and 2 cases of lymphoplasmacytic lymphoma (positive control)]...
May 4, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Newton A C S Wong, Philippe Taniere, Shaun Walsh, Andrew Wallace, Daisuke Nonaka, Thomas Jones, David Gonzalez
A unique cohort of chemo-naive gastrointestinal stromal tumors (GISTs) with double-primary tyrosine kinase mutations was characterized particularly to determine whether coexistent mutations represent a single mutational event. Up to 2013, 4 UK centers reported 9 GISTs with 2 primary tyrosine kinase mutations. In each of 8 cases validated by next generation sequencing, both mutations were present in the same allele of the same exon (KIT exon 11 or 17, or PDGFRA exon 18). One case showed the second mutation only on some of the mutant alleles...
May 4, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Suéllen Trentin Brum, Ana Paula Demasi, Rafael Fantelli Stelini, Maria Letícia Cintra, Vera Cavalcanti de Araujo, Andresa Borges Soares
Endoglin, known to be expressed in proliferating vessels, is of worth when evaluating microvessel density as a prognostic factor in many types of malignancies, including some subtypes of leukemia cells. In childhood acute lymphoblastic leukemia, endoglin is associated with adverse outcome. In bone marrow, endoglin identifies the repopulating hematopoietic stem cells. Mast cells are a component of normal tissue and play an important role in the regulation of several processes, including inflammation and neoplasia...
May 4, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Marko Klarić, Herman Haller, Alemka Brnčić Fischer, Emina Babarović, Aleksandra Prijić, Senija Eminović
Hyaluronan controls cell migration, differentiation, and proliferation, and it is involved in tumor invasion. The extracellular matrix containing hyaluronan regulates cell behavior via cell surface receptors such as CD44 and receptor for hyaluronan-mediated motility (RHAMM, CD168). We investigated the expression of CD44 and RHAMM in tissue samples of endometrial cancer and the relation of their expression with clinicopathologic parameters of patients. In order to evaluate the value of CD44 and RHAMM as prognostic factors, we investigated the relation of their expression with patients' survival...
May 4, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Vanina S Fishkel, Fernando C Monge, Felicitas M von Petery, Karen E Tapper, Teresa M Peña, Florencia Torres, Fernando A Poletta, Jorge F Elgart, Alejandra Avagnina, Valeria Denninghoff
The detection of high-grade intraepithelial lesions requires highly sensitive and specific methods that allow more accurate diagnoses. This contributes to a proper management of preneoplastic lesions, thus avoiding overtreatment. The purpose of this study was to analyze the value of immunostaining for p16 in the morphologic assessment of cervical intraepithelial neoplasia 2 lesions, to help differentiate between low-grade (p16-negative) and high-grade (p16-positive) squamous intraepithelial lesions. The direct medical cost of the treatment of cervical intraepithelial neoplasia 2 morphologic lesions was estimated...
May 4, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Llucia Alos, Leonardo Rodriguez-Carunchio, Albert Brugués, Carla Fuster, Magda Pinyol, Susana Puig
No abstract text is available yet for this article.
May 4, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Feng Hou, Duan-Bo Shi, Yun-Qing Chen, Peng Gao
Increasing evidence supports an important role for the human epidermal growth factor receptor-2 (HER2) gene and mitogen-activated protein kinase (MAPK) signaling pathways in the progression of human cancers by enhancing cancer cell metastasis and proliferation. However, the relationship between HER2 and MAPK signaling pathways in gastric cancer (GC) remains unclear. In the present study, dual in situ hybridization was performed to detect HER2 gene amplification and reverse transcription-quantitative polymerase chain reaction was used to investigate the mRNA expression of members of the MAPK signaling pathway, including rapidly accelerated fibrosarcoma (RAF), extracellular regulated signal-activated kinase (ERK), p38, and c-Jun N-terminal kinase (JNK), in 112 primary GC tissue samples...
May 4, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Veronika Buxhofer-Ausch, Maidah Sheikh, Christoph Ausch, Simone Zotter, Heike Bauer, Marina Mollik, Angelika Reiner, Andreas Gleiss, Walter Jäger, Christian Sebesta, Stephan Kriwanek, Theresia Thalhammer
The abundance of OATP4A1 in colorectal cancer (CRC) might be related to tumor progression. This was studied by immunohistochemistry on paraffin-embedded samples obtained from 178 patients (43 patients with a relapse within 5 y) with early-stage CRC. Positivity for OATP4A1 in tumor cells and noncancerous mucosal cells was proved by double-immunofluorescence staining with antibodies against OATP4A1 and keratin 8, whereas antibodies against appropriate CD markers were used to identify immune cells. Automated microscopic image analysis was used to measure the percentage of OATP4A1-positive cells and OATP4A1 staining intensity in tumor, immune, and adjacent normal-looking mucosal cells separately, as well as in the mucosal and immune cells of 14 nonmalignant tissue samples...
May 3, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Angel Fernandez-Flores, José M Suarez Peñaranda, Gonzalo De Toro, Cesar C Alvarez Cuesta, Maria T Fernández-Figueras, Werner Kempf, Carlos Monteagudo
High-endothelial venules are a common feature of 3 types of cutaneous pseudolymphomas: pretibial lymphoplasmacytic plaque (PLP) of children, acral pseudolymphomatous angiokeratoma of children (APACHE), and T-cell rich angiomatoid polypoid pseudolymphoma (TRAPP). In addition, primary cutaneous angioplasmacellular hyperplasia (PCAH) overlaps with these other 3 conditions. We intend to study the expression of peripheral node addressins in PLP, APACHE, TRAPP, and PCAH. We studied 1 case of PLP, 2 cases of APACHE, 2 cases of TRAPP, and 2 cases of PCAH...
July 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Carol C Cheung, Paul E Swanson, Søren Nielsen, Mogens Vyberg, Emina E Torlakovic
OBJECTIVES: The occurrence of uneven staining (UES) in automated immunohistochemistry (IHC) has been experienced by clinical laboratories and has the potential to confound readout, interpretation, and reporting of IHC assays despite the presence optimally stained on-slide controls. However, there are no studies of this phenomenon in regard to the type, frequency, and association with different automated IHC platforms. We studied the occurrence of UES in automated IHC assays with real world examples from clinical practice and by using a laboratory developed methodology to monitor baseline and periodic performance of automated IHC instruments...
May 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Marina G Teixeira, Luciana Corrêa
Cancer stem cells (CSC) have been investigated as prognostic markers in oral squamous cell carcinoma (OSCC). However, an assessment of the reporting quality of these studies has not been performed yet. The aim of this study was to describe the reporting quality of prognostic studies involving CSCs and OSCC, focusing mainly on the immunohistochemical reproducibility. By means a systematic review, 34 articles were selected. Analyses of both general reporting quality and immunohistochemistry technique were performed by using checklists for multiple aspects related to study reproducibility...
May 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Eszter Szánthó, Bettina Kárai, Gergely Ivády, Judit Bedekovics, István Szegedi, Miklós Petrás, György Ujj, Anikó Ujfalusi, Csongor Kiss, János Kappelmayer, Zsuzsanna Hevessy
Disseminating cells of a primary solid tumor may represent the origin of metastases and relapses. We aimed at comparing the diagnostic efficacy of multicolor flow cytometry (MFC) and morphology/immunohistochemistry (IHC) in the detection of disseminated tumor cells in the bone marrow (BM) and body fluids of patients with solid tumors, and in pediatric neuroblastoma cases. We investigated 72 samples retrospecively from 50 patients by MFC. Morphology/IHC data were available in 48 cases. In the first cohort, 36 samples derived from 34 patients with various forms of suspected and proven solid tumors and in the second cohort, 36 samples of 16 children with suspected and proven neuroblastoma were analyzed at diagnosis or during follow-up in a 4-color setting by MFC, and the results were compared with those obtained by IHC...
May 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
Francesco Pierconti, Maurizio Martini, Tonia Cenci, Luigi M Larocca
BACKGROUND: Recently, we demonstrated that hypermethylation of SOCS3 determines a significant reduction of its mRNA and protein expression and identifies a subgroup of prostate cancer with aggressive behavior. In this paper, our objective was to investigate whether the immunohistochemical expression of the SOCS3 protein could represent an alternative method to molecular analysis for the individualization of aggressive prostate carcinoma. MATERIALS AND METHODS: We analyzed the SOCS3 immunohistochemical expression in 65 patients undergoing biopsies at the Institute of Urology of our hospital between September 2011 and October 2011 (median age, 66...
May 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
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