Archive for the 'Immunohistochemistry or IHC' Category
Often used to diagnose cancer, Immunohistochemistry or IHC is a process by which antibodies are detected in tissue samples by use of a specific antigen or antigens. IHC is also widely used in basic research to understand the distribution and localization of biomarkers in different parts of a tissue (also see “Serum Marker/Blood Test“).
March 11th, 2008. Expression of cell adhesion molecule 1 in malignant pleural mesothelioma as a cause of efficient adhesion and growth on mesothelium
These phenotypic differences were not detectable in cocultures on lung fibroblastic monolayers, in which all MPM cells grew much more slowly than on mesothelial cells, irrespective of CADM1 positivity. CADM1 thus appears to mediate efficient adhesion and growth of MPM cells specifically on mesothelial cells, probably via trans-heterophilic binding, and thus may be involved in the manifestation of a considerable subset of MPMs as diffusely growing tumors disseminated over the pleural surface.
March 8th, 2008. Improved identification of malignant cells in serous effusions using a small, robust panel of antibodies on paraffin-embedded cell suspensions
Conclusion: Immunocytochemical staining of standardized cell block reparations of serous fluid cells with a small panel of 4 antibodies significantly improves diagnostic results compared to cytomorphologic evaluation alone.
March 6th, 2008. Application of Immunohistochemistry to the Diagnosis of Malignant Mesothelioma
Conclusions: Various antibody panels have been recommended for the diagnosis of MM, with no overall consensus about how many and which markers should be used. A recent study with Bayesian statistics has demonstrated that the use of many markers does not provide higher diagnostic accuracy than the use of selected single antibodies or various combinations of only 2 markers. There is a need for the development of evidence-based or consensus-based guidelines for the diagnosis of MM in different differential diagnosis situations.
March 5th, 2008. Use of immunocytochemical assays in the study of exudates from serous cavities in the practical work of a laboratory
In 31 cases, adenogenic carcinoma metastases to the serous cavities were typified by an immunopositive reaction to CEA, Ber-EP4, EMA, and cytokeratins and a negative reaction to calretinin, mesothelin, and thrombomodulin. There was occasionally a positive reaction to CD-15 and vimentin.
February 29th, 2008. 9p21 Deletion in the diagnosis of malignant mesothelioma in serous effusions additional to immunocytochemistry, DNA-ICM, and AgNOR analysis
Conclusions: Because of these results, the authors propose the sequential application of immunocytochemistry, DNA-ICM, and AgNOR analysis to establish a cytological diagnosis of malignant mesothelioma in serous effusions. In persistent doubtful diagnoses, the authors recommend fluorescence in situ hybridization to analyze the 9p21 deletion.
February 28th, 2008. Unusual Features of Malignant Pleural Mesothelioma Metastatic to the Mediastinal Lymph Nodes
In summary, MPM may present as mediastinal lymphadenopathy with metastases or it may be a concurrent neoplasm with other malignancies or shows an unusual immunohistochemical staining pattern. Caution should be used when diagnosing mesothelial cell inclusions in MLNs.
February 28th, 2008. Pleural mesothelioma: diagnostic problems and evaluation of prognostic factors
Conclusion: MPM is an increasing disaster in Egypt which is underestimated and neglected. A panel of immunohistochemical markers should be used for proper evaluation. p27 has proven to be a potential biologic prognostic marker for mesothelioma and more studies as regard its significance are recommended on a larger number.
February 22nd, 2008. Epidemiology, molecular biology, diagnostic and therapeutic strategy of malignant pleural mesothelioma in 2007 – an update
Antiangiogenic agents such as bevacizumab (Avastatin) may be of interest but need to be tested in phase 3 trials. The Mesothelioma Avastatin Pemetrexed Study (MAPS) is ongoing, coordinated by the French Thoracic Cancer Intergroup (IFCT).
Posted in Angiogenesis, Bevacizumab (Avastatin), Causation, Chemotherapy, CT or CAT scan, Diagnosis & Differentiation, Epidemiological, Extrapleural Pneumonectomy (EPP), Full Archive, General, Immunohistochemistry or IHC, Pemetrexed (Alimta), PET Scan, Pleural, Surgery, thoracoscopy, Treatment, Type of Assessment:, Type of Mesothelioma: | No Comments »
February 19th, 2008. Mesothelin-related predictive and prognostic factors in malignant mesothelioma: A nested case–control study
High age (>65 years) was an independent negative prognostic factor that was related to both mesothelin expression and asbestos exposure. Mesothelioma of the epithelial type of the peritoneum had a significantly longer survival than epithelial type in pleura and was also related to mesothelin expression.
February 11th, 2008. Expression of mesothelin as a potential diagnostic marker in mesothelioma
None of the sarcomatoid mesotheliomas exhibited positivity for this marker, nor was any reactivity seen in the spindle cell component of the biphasic mesotheliomas. These findings indicate that, in some instances, mesothelin immunostaining can assist in the diagnosis of mesothelioma.
February 7th, 2008. PTEN expression is a strong predictor of survival in mesothelioma patients
Conclusion: PTEN is an independent prognostic biomarker in mesothelioma patients. The frequent loss of expression of the tumour suppressor gene PTEN suggests involvement of the PI3K-AKT/protein kinase B (PKB) pathway in MPMs, which may be relevant for future mesothelioma treatment.
January 29th, 2008. Xanthomatous Pleuritis Mimicking Mesothelioma
Our patient quickly recovered with steroid therapy and is without recurrence 18 months later. This case demonstrates the utility and nuances of medical thoracoscopy in a perplexing case of xanthomatous pleuritis.
January 26th, 2008. CaSm (LSm-1) Over-expression in Lung Cancer and Mesothelioma Is Required for Transformed Phenotypes
Cell lines expressing exogenous CaSm also exhibit transformed characteristics, including increased anchorage-independent colony formation and tumor growth. Thus, the results of loss of function and gain of function studies presented both indicate that CaSm functions as an oncogene in the promotion of cellular transformation and cancer progression.
January 18th, 2008. Differential diagnosis of sarcomatoid mesothelioma from true sarcoma and sarcomatoid carcinoma using immunohistochemistry
2, WT1, and AE1/AE3 is recommended for routine pathological diagnosis. Accurate clinical information is necessary for differentiating sarcomatoid mesothelioma from sarcomatoid carcinoma.
January 11th, 2008. Cytologic malignancy versus benignancy: how useful are the “newer” markers in body fluid cytology?
Conclusions: MOC-31 and D2-40 were very sensitive and specific markers of epithelial and mesothelial cells, respectively. Compared with calretinin, D2-40 was a more sensitive marker of mesothelial cells. WT1 proved to be nonspecific. XIAP was not a sensitive marker for malignancy and had a limited value in cytology. We recommend using a panel to include MOC-31 and D2-40 to improve diagnostic accuracy in body cavity effusions.
January 9th, 2008. Early cytological diagnosis of diffuse malignant mesothelioma of the peritoneum: A case report
Routine cytology supported by three adjuvant methods enabled us to correctly establish the diagnosis. Our case suggests that a cytological diagnosis of malignant mesothelioma supported by adjuvant methods should not be rejected even if based on negative histological results.
December 29th, 2007. Podoplanin is a Better Immunohistochemical Marker for Sarcomatoid Mesothelioma Than Calretinin
Overall sensitivities and pecificities were 84% and 99% for antipodoplanin, and 86% and 96% for D2-40. These findings suggest that cytoplasmic podoplanin expression may be useful in the diagnosis of sarcomatoid mesothelioma, although it should be used with caution on biopsy material.
December 22nd, 2007. Utility of anti-L523S antibody in the diagnosis of benign and malignant serous effusions
Conclusions: Anti-L523S antibody is a useful marker for the detection of malignant cells in serous effusions and it can have significant utility in differentiating reactive mesothelial cells from malignant mesothelioma and metastatic carcinoma in combination with calretinin and CK5/6 staining.
December 20th, 2007. EGFR And PDGFR Differentially Promote Growth In Malignant Epitheloid Mesothelioma Of Short- And Long-term Survivors
Our study provides novel insights into the regulatory mechanisms of signalling pathways in MPM, which differentially promote tumour growth in LTS and STS. We demonstrate that small scale proteomics can be carried out by a powerful linkage of TMA, immunohistochemistry, and statistical methods to identify proteins which might be relevant targets for therapeutic intervention.
December 13th, 2007. Fluoro-edenite fibres induce lung cell apoptosis: an in vivo study
The integrity of alveolar epithelium and alveolar apoptosis are critical determinants in the pathways that initiate fibrogenesis in the lung and fibroblastic foci are usually found close to abnormal or denuded alveolar epithelium. Our results are consistent with the hypothesis that apoptosis is an important mechanism for removing cells with irreparable fluoro-edenite-induced genetic changes that predispose them to a neoplastic evolution.
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