Molecular classification of diseases based on multigene expression signatures is increasingly used for diagnosis, prognosis, and prediction of response to therapy. Immunohistochemistry (IHC) is an optimal method for validating expression signatures obtained using high-throughput genomics techniques since IHC allows a pathologist to examine gene expression at the protein level within the context...

This study aimed to re-evaluate the concordance between FISH and IHC for HER-2 status, and evaluate its clinicopathologic significance in breast cancer by the new guideline (2014) in China. We determined the HER-2 status in 589 cases of invasive breast cancer, the concordance and correlation between these two results and their relationship to cliniopathological characteristics were evaluated. T...

Background. The feasibility and accuracy of immunohistochemistry (IHC) on frozen sections, when assessing sentinel node (SN) status intraoperatively in breast cancer, is a matter of continuing discussion. In this study, we compared a center using IHC on frozen section with a center not using this method with focus on intraoperative diagnostic values. Material and Methods. Results from 336 patie...

To test the feasibility of semiquantitative immunohistochemical staining (IHC) with large sized gold conjugated secondary antibody (gold-2 degrees Ab), we used beads covered with a known amount of primary antibody and a secondary antibody conjugated with gold colloid particles (20 and 40 nm in diameter), and we compared the results to those obtained by enzyme IHC. Beads coated with 6 graded amo...

AIM To evaluate the clinical usefulness of three commercially available assays for Her-2/neu oncogene and protein measurements. The Her-2/neu protein is overexpressed, mostly as a result of gene amplification, in 20-30% of human breast cancers, and has been shown to have prognostic and predictive value for treatment with chemotherapy or the new monoclonal antibody, Herceptin. METHODS An immun...

UNLABELLED Immunohistochemical (IHC) assays performed on formalin-fixed paraffin-embedded (FFPE) tissue sections traditionally have been semi-quantified by pathologist visual scoring of staining. IHC is useful for validating biomarkers discovered through genomics methods as large clinical repositories of FFPE specimens support the construction of tissue microarrays (TMAs) for high throughput st...

introduction: primary gastric lymphoma (pgl) is a rare tumor, whose differential diagnosis may become complicated without precise immunohistochemistry (ihc) and genetic analysis. case presentation: a 33-year-old woman presented with gastric cancer and had undergone gastrectomy without precise ihc and staging in another center. inappropriate ihc after surgery showed diffuse large b-cell lymphoma...