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Applied Immunohistochemistry & Molecular Morphology: AIMM

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https://www.readbyqxmd.com/read/27801737/digital-image-analysis-of-her2-immunostained-gastric-and-gastroesophageal-junction-adenocarcinomas
#1
Sofie L Nielsen, Søren Nielsen, Mogens Vyberg
Manual assessment of human epidermal growth factor receptor 2 (HER2) protein expression by immunohistochemistry (IHC) in gastric and gastroesophageal junction (GGEJ) adenocarcinomas is prone to interobserver variability and hampered by tumor heterogeneity and different scoring criteria. Equivocal cases are frequent, requiring additional in situ hybridization analysis. This study aimed to evaluate the accuracy of digital image analysis for the assessment of HER2 protein expression. In total, 110 GGEJ adenocarcinomas were included in tissue microarrays with 3 tissue cores per case...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27801736/an-ios-app-to-expedite-the-evaluation-of-immunohistochemistry-control-tissue
#2
Wilfrido D Mojica, Gregg W Mojica
Control tissues play a vital role in diagnostic immunohistochemistry. They serve to document that the appropriate antibody was used, on the correct control tissue, and run on optimized conditions. As part of the evolving process of standardization in diagnostic immunohistochemistry, specific tissues have been identified based on agreement by experts in this field capable of serving as the benchmark(s) for several antibodies. These tissues are recommended based on known and predictable levels of strong, weak, and no expression of the antigen being queried...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27801735/fading-with-time-of-pd-l1-immunoreactivity-in-non-small-cells-lung-cancer-tissues-a-methodological-study
#3
Francesca Giunchi, Alessio Degiovanni, Niccolò Daddi, Rocco Trisolini, Andrea Dell'Amore, Claudio Agostinelli, Andrea Ardizzoni, Michelangelo Fiorentino
Blockade of inhibitory immune checkpoints is currently arising as a potential immunologic option for tumor therapy. Inhibition of programmed cell death protein 1 and/or its specific ligand programmed death-ligand 1 (PD-L1) was effective in clinical trials in advanced melanoma, non-small cell lung cancer (NSCLC) bladder and kidney cancer. The predictive role of the immunohistochemical (IHC) expression of PD-L1 is highly debated. Different reagents, clones, cutoffs of cell expression and subjective interpretation of PD-L1 immunoreactivity in epithelial cells and lymphocytes are the main issue...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27801734/pd-l1-expression-in-carcinosarcomas-of-the-gynecologic-tract-a-potentially-actionable-biomarker
#4
Andre Pinto, Nicholas Mackrides, Mehrdad Nadji
BACKGROUND: Carcinosarcomas of the gynecologic tract, also known as malignant mixed Müllerian tumors, are aggressive neoplasms with a high recurrence rate and poor prognosis. Despite advances in adjuvant therapies in recent years, the prognosis of these tumors has not improved. In fact, there are currently no consensus guidelines for the treatment of these neoplasms and the search for targetable biomarkers has not been successful so far. Programmed death-ligand 1 (PD-L1) has emerged as a potential target for therapeutics in a number of malignant tumors, including melanoma, lung, and colorectal cancer...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27801733/the-inflammatory-milieu-of-eosinophilic-esophagitis-a-contemporary-review-with-emphasis-in-putative-immunohistochemistry-and-serologic-markers
#5
Marcos Lepe, David O'Connell, Kara A Lombardo, Michael Herzlinger, Shamlal Mangray, Murray B Resnick, Andres Matoso
Eosinophilic esophagitis is a chronic disease characterized by esophageal dysfunction, frequent clinical history of atopy, and eosinophilic inflammation of the esophagus. Within the esophageal mucosa, there is a wide variety of immune mediators, chemotactic factors, mediators of transcription, and markers of epithelial differentiation and integrity that are overexpressed or underexpressed in eosinophilic esophagitis, offering many candidates for biomarkers with diagnostic or prognostic potential. In this review, we summarize the results from studies performed so far to evaluate the detection of these markers by immunohistochemistry on esophageal biopsies...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27801732/wif-1-and-ihh-expression-and-clinical-significance-in-patients-with-lung-squamous-cell-carcinoma-and-adenocarcinoma
#6
Yue Zhang, Chunhong Hu
This study investigated the expression of wingless-type inhibitory factor-1 (WIF-1) and Ihh protein in tumor tissues and their clinical significance in patients with lung squamous cell carcinoma and adenocarcinoma. The expression of WIF-1 and Ihh protein in 74 squamous cell carcinomas and 76 adenocarcinomas was measured by immunohistochemistry. The percentage of positive WIF-1 protein expression was significantly higher, while positive Ihh protein expression was significantly lower in patients with well-differentiated lung squamous cell carcinoma and adenocarcinoma, tumor node metastasis (TNM) stage I disease, and lymph node metastasis than that in patients with poorly differentiated tumor, TNM stage III disease, and lymph node metastasis (P<0...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27801731/dedifferentiated-liposarcoma-masquerading-as-rhabdomyosarcoma
#7
Anna Kobayashi, Takanori Hirose, Eiji Kudo, Youichiro Kawashita, Toshiyuki Yagi
We present a rare case of retroperitoneal dedifferentiated liposarcoma (DDLPS) masquerading as rhabdomyosarcoma. The patient was a 74-year-old man, complaining a loss of appetite. Abdominal computed tomography revealed a retroperitoneal mass, 10 cm in diameter, between the liver and the right adrenal gland. The tumor was resected and histologically diagnosed as conventional DDLPS, in which dedifferentiated component was highly cellular and composed of pleomorphic anaplastic cells. After 3 years, the tumor recurred in the right retroperitoneal space...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27801730/multifocal-supra-and-infratentorial-medulloblastoma-in-an-adult-histologic-immunohistochemical-and-molecular-evaluation-of-a-rare-case-and-review-of-the-literature
#8
Ali G Saad, Vladimir Balik, Aatif Parvez, Siraj M El Jamal
Multifocal medulloblastomas (MMBs) in adults are exceedingly rare with only 5 reported cases to date. Medulloblastoma in adult differ from its childhood counterpart by being more often lateral in location, desmoplastic in morphology, and better in clinical prognosis. Little is known, however, about the characteristic features of MMB. This is particularly true for their molecular profiles. To date, molecular characteristics of multifocal medulloblastoma have been reported only once. Here, we present the second case of multifocal medulloblastoma along with its detailed morphology, imaging features, and molecular profiles with a critical review of the literature...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27801729/richter-syndrome-with-plasmablastic-lymphoma-at-primary-diagnosis-a-case-report-with-a-review-of-the-literature
#9
Andrea Ronchi, Laura Marra, Ferdinando Frigeri, Gerardo Botti, Renato Franco, Annarosaria De Chiara
Richter syndrome (RS) is considered as the rare development of an aggressive lymphoid malignancy in a preexisting small lymphocytic lymphoma/chronic lymphocytic leukemia. The most common aggressive lymphoma developing in this setting is diffuse large B-cell lymphoma, but classical Hodgkin lymphoma and other much rarer entities such as prolymphocytic lymphoma and dendritic cell sarcoma are also described, most frequently in the progression of the disease over time. A clonal relation between the 2 neoplastic proliferations can be frequently found, whereas clonally unrelated cases are commonly considered as independent tumors, probably due to a variable combination of multiple causes, responsible independently for the 2 neoplasms...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27801728/egfr-mutational-profiling-in-non-small-cell-lung-cancer-the-clinical-performance-of-a-sensitive-reverse-hybridization-assay
#10
Gernot Kriegshäuser, Dietmar Enko, Michael Novy, Anita Reitmayr, Almute Loidl, Gabriele Halwachs-Baumann, Christian Oberkanins
In patients with non-small cell lung cancer (NSCLC), epidermal growth factor receptor (EGFR) mutations have been associated with the tumor response to targeted therapy with EGFR tyrosine kinase inhibitors. Although labor intensive and not very sensitive (ie, an analytical sensitivity of 20%), direct sequencing is widely used for mutation detection. This study aimed at evaluating the potential of a test strip-based reverse-hybridization assay (EGFR StripAssay), designed for the simultaneous detection of 16 mutations in exons 18 to 21 of the EGFR gene, to sensitively identify EGFR mutation in DNA from NSCLC tissue samples...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27801727/the-immunohistochemical-analysis-of-socs3-protein-identifies-a-subgroup-of-prostatic-cancer-biopsies-with-aggressive-behavior
#11
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...
October 31, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27753663/primary-carcinoid-tumor-of-the-renal-pelvis-arising-from-intestinal-metaplasia-an-unusual-histogenetic-pathway
#12
Maria G Kuba, Allison Wasserman, Cindy L Vnencak-Jones, Julia A Bridge, Lan Gellert, Omar Hameed, Giovanna A Giannico
OBJECTIVES: Primary carcinoid tumor of the renal pelvis is a rare neoplasm with few cases reported in the literature. Here we present the clinical and histopathologic findings of a primary carcinoid tumor arising in the left renal pelvis of a horseshoe kidney in a 61-year-old female patient. MATERIALS AND METHODS: Pathologic features were evaluated with standard hematoxylin and eosin sections and immunohistochemical studies. A literature review was performed to place our case in context to previous reports...
October 7, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27753662/the-squamous-cells-of-adenosquamous-carcinoma-ascc-of-the-prostate-might-represent-a-terminally-differentiated-quiescent-component-immunohistochemical-evidence-from-a-case-of-ascc-with-pleomorphic-giant-tumor-cells
#13
Andres M Acosta, Andre Kajdacsy-Balla, John V Groth
No abstract text is available yet for this article.
October 7, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27753661/pulmonary-adenocarcinoma-with-enteric-differentiation-immunohistochemistry-and-molecular-morphology
#14
Alessia Nottegar, Fabrizio Tabbò, Claudio Luchini, Matteo Brunelli, Emilio Bria, Nicola Veronese, Antonio Santo, Sara Cingarlini, Eliana Gilioli, Chiara Ogliosi, Albino Eccher, Licia Montagna, Serena Pedron, Claudio Doglioni, Maria G Cangi, Giorgio Inghirami, Marco Chilosi
Pulmonary adenocarcinoma with enteric differentiation (PAED) is a rare subtype of lung adenocarcinoma recently recognized in the WHO classification. It is defined as an adenocarcinoma in which the enteric component exceeds 50% and have to show the expression of at least 1 immunohistochemical marker of enteric differentiation. Although the definition of this tumor type is very important, above all in the differential diagnosis between a primary lung tumor and a metastasis of colorectal adenocarcinoma, this cancer still lacks a distinctive immunohistochemical and molecular signature...
October 7, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27753660/assessment-of-egfr-and-erbb2-her2-in-gastric-and-gastroesophageal-carcinomas-egfr-amplification-is-associated-with-a-worse-prognosis-in-early-stage-and-well-to-moderately-differentiated-carcinoma
#15
Jia-Bin Liao, Huai-Pao Lee, Hsiao-Ting Fu, Herng-Sheng Lee
Epidermal growth factor receptor 1 (EGFR) and erb-b2 receptor tyrosine kinase 2 (ERBB2/HER2) are frequently dysregulated in human cancers. We analyzed EGFR and ERBB2 status in 105 gastric and gastroesophageal junction carcinoma and their clinicopathologic features. For EGFR, 92 (88%) tumors were scored as 0, 2 (2%) as 1+, 7 (7%) as 2+, and 4 (3%) as 3+ by immunohistochemistry (IHC) and 4 (4%) tumors showed EGFR amplification by fluorescence in situ hybridization (FISH). For ERBB2, 90 (86%) tumors were scored as 0, 4 (4%) as 1+, 6 (6%) as 2+, and 5 (5%) as 3+ by IHC and 12 (12%) showed ERBB2 amplification by FISH...
October 7, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27753659/expression-of-tle-1-and-cd99-in-carcinoma-pitfalls-in-diagnosis-of-synovial-sarcoma
#16
Daniel J Zaccarini, Xiaobing Deng, Jamie Tull, Charlene Maciak, Alfredo L Valente, Shengle Zhang
The characteristic immunoprofile for the diagnosis of synovial sarcoma, a neoplasm of unclear tissue origin, is expression of transducer-like enhancer of split 1 (TLE-1), CD99, partial expression of cytokeratin, and epithelial membrane antigen by immunohistochemistry (IHC). Diagnostic dilemma or misdiagnosis can occur due to overlap in IHC and morphology with carcinomas, and particularly poorly differentiated and metastatic tumors. The frequency of TLE-1 and CD99 expression in carcinomas by IHC has not been previously assessed...
October 7, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27753658/immunohistochemical-expression-of-antitissue-transglutaminase-2-in-tissue-injuries-an-interpretation-beyond-celiac-disease
#17
Prasenjit Das, Ramakant Rawat, Anil K Verma, Geetika Singh, Archana G Vallonthaiel, Rajni Yadav, Gaurav P S Gahlot, Amit K Dinda, Vineet Ahuja, Siddhartha Datta Gupta, Sanjay K Agarwal, Govind K Makharia
Tissue transglutaminase 2 enzyme plays a diverse role in intracellular and extracellular functioning. Aberrant expression of anti-TG2 antibody has recently been proposed for extraintestinal identification of celiac disease (CeD), but its utility is questionable. To examine whether anti-TG2 immunohistochemical (IHC) staining can be of diagnostic value in identifying extraintestinal involvement in CeD, tissue blocks of patients with IgA nephropathies (IgAN), minimal change disease, membranous glomerulonephritis, membrano-proliferative glomerulonephritis, normal kidney, intestinal biopsies from CeD, tropical sprue, nonspecific duodenitis, and inflammatory bowel disease; liver biopsies from patients with chronic hepatitis B and C, acute liver failure (ALF), and CeD-associated liver diseases were retrieved and subjected to IHC staining for anti-tissue transglutaminase 2 enzyme...
October 7, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27753657/a-comparative-immunohistochemical-study-of-epithelial-membrane-antigen-and-nherf1-ebp50-in-the-diagnosis-of-ependymomas
#18
Aruna Nambirajan, Mehar C Sharma, Madhu Rajeshwari, Aanchal Kakkar, Vaishali Suri, Chitra Sarkar
Ependymomas are gliomas that recapitulate normal ependymal cells. The epithelial membrane antigen (EMA) shows "dot-like" and "ring-like" staining patterns, highlighting "microlumens" or intracytoplasmic rosettes, a pathognomonic ultrastructural feature. NHERF1/EBP50, an adaptor protein localized at the apical plasma membrane of human epithelia, has been found to localize to these microlumens. We aimed to analyze the staining patterns of EMA and EBP50 in ependymomas and other tumors, and thereby compare their diagnostic utility...
October 7, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27753656/expression-patterns-of-biomarkers-in-primary-tumors-and-corresponding-metastases-in-breast-cancer
#19
Iben Kümler, Eva Balslev, Ann S Knop, Nils Brünner, Tobias W Klausen, Sofie S Jespersen, Signe L Nielsen, Dorte L Nielsen
Tumor heterogeneity has been shown for several cancers including breast cancer (BC). Despite the fact that expression of tumor markers may change throughout the metastatic process, rebiopsies at the time of recurrence are still not performed routinely at all institutions. The aims of the study were to evaluate changes in biomarker profiles during the metastatic process and to investigate whether previous anthracycline or endocrine therapy given in the adjuvant setting could affect the biomarker profile in metastatic lesions...
October 7, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27753655/role-of-yap-1-in-thyroid-tumor-progression-and-outcome
#20
Clara Ugolini, Nicla Borrelli, Cristina Niccoli, Rossella Elisei, David Viola, Paolo Vitti, Paolo Miccoli, Fulvio Basolo
CONTEXT: Yes-associated protein-1 (YAP-1) is a player of the Hippo pathway and is involved in regulating cell proliferation. YAP-1 is overexpressed in papillary and anaplastic thyroid cancers. However, a correlation between YAP-1 expression and outcome in thyroid carcinoma has not been conclusively demonstrated. OBJECTIVE: This study was designed to clarify whether YAP-1 may be considered a marker of worse prognosis and outcome in thyroid cancer. DESIGN: A large series of cases of thyroid cancer with a long follow-up were investigated for YAP-1 expression...
October 7, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
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