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“).
July 1st, 2008. Malignant mesothelioma with heterologous elements: clinicopathological correlation of 27 cases and literature review
Immunohistochemical labelling for cytokeratins is helpful in the distinction, but lack of labelling for cytokeratins in a spindle cell/sarcomatoid tumour does not exclude the diagnosis of mesothelioma, irrespective of the presence of heterologous elements. We suggest that if the anatomical distribution conforms to that of mesothelioma, a diagnosis of heterologous mesothelioma should be made in preference to a diagnosis of primary pleural osteosarcoma or chondrosarcoma, regardless of cytokeratin positivity, as for conventional non-heterologous sarcomatoid mesothelioma.
Posted in Biphasic or Mixed, Causation, Diagnosis & Differentiation, Epithelioid, Full Archive, General, Immunohistochemistry or IHC, Peritoneal (Abdominal Mesothelioma), Pleural, Sarcomatoid, Survival, Type of Assessment:, Type of Mesothelioma: | No Comments »
June 26th, 2008. Coalescent pleural malignant mesothelioma and adenocarcinoma of the lung, involving only minor asbestos exposure
The former was positive for adenocarcinoma markers such as CEA, Ber-EP4, PE-10, thyroid transcription factor-1 and Napsin A, and negative for mesothelial markers including calretinin, D2-40, WT-1 and HBME, while the latter was the opposite, resulting in a diagnosis of coalescing malignant mesothelioma and adenocarcinoma. The panel of antibodies used for immunohistochemistry was useful to distinguish the two different components in the one tumor.
June 17th, 2008. Benign multicystic peritoneal mesothelioma in a cesarean-section scar presenting as a fungating mass
This unusual presentation may point to a traumatic or inflammatory etiology, although seeding of the wound during the previous surgeries is a more likely postulate. A pertinent review of the literature on benign multicystic mesothelioma is also presented.
June 15th, 2008. Prognostic role of osteopontin expression in malignant pleural mesothelioma
0001), and overall survival analysis showed that low osteopontin expression was associated with longer survival; multivariate analysis confirmed the value of osteopontin expression as an independent prognostic factor (P < . 0001).
June 11th, 2008. Pemetrexed plus carboplatin in elderly patients with malignant pleural mesothelioma: combined analysis of two phase II trials
Apart from slightly worse haematological toxicity, there was no significant difference in outcome or toxicity between age groups. The PC regimen is effective and well tolerated in selected elderly patients with MPM.
Posted in Carboplatin, Causation, Chemotherapy, Determining Efficacy, Diagnosis & Differentiation, Epidemiological, Full Archive, Immunohistochemistry or IHC, Occupational Asbestos Exposure, PET Scan, Pemetrexed (Alimta), Pleural, Treatment, Type of Assessment: | No Comments »
June 6th, 2008. Uroplakin is not a Reliable Immunohistochemical Marker for Malignant Mesothelioma of the Pleura
Conclusions: At an antibody dilution for which positive and negative control tissues stain appropriately, PMM does not stain for URO. At higher antibody concentrations, PMM exhibits nonspecific cytoplasmic staining. We assert that URO is not a useful immunohistochemical marker for the detection of PMM. Further studies addressing whether URO is overexpressed at the mRNA level in PMM are warranted.
June 6th, 2008. Diagnostic usefulness and challenges in the diagnosis of mesothelioma by endoscopic ultrasound guided fine needle aspiration
Real time endoscopic ultrasound (EUS) combined with FNA has been shown to be a very sensitive technique to obtain samples from different organ sites, including mediastinal lesions. The use of EUS-FNA for the diagnosis of mesothelioma, reinforces the role of a cytopathologist as a cohesive team player along with a radiologist and a clinician during on-site assessment for the proper triage of additional specimens for ancillary studies leading to a better patient management.
June 6th, 2008. Cytomorphologic features of well-differentiated papillary mesothelioma in peritoneal effusion: A case report
The identification of a collagenous ball within these clusters is a useful cytologic finding for the diagnosis of WDPM. WDPM should be suspected when numerous collagenous balls are present by effusion cytology and isolated cells are not.
May 29th, 2008. Malignant mesothelioma of the tunica vaginalis testis in a petrochemical worker exposed to asbestos
Tunical mesothelioma may simulate metastatic carcinoma at routine histopathological examination. Immunohistochemistry and occupational anamnesis are helpful for the correct diagnosis, which, in turn, is important for prognosis and treatment, and in relation to legal issues when asbestos is involved in the causation of the disease.
Posted in Case Study, Causation, Diagnosis & Differentiation, Epithelioid, Full Archive, Immunohistochemistry or IHC, Occupational Asbestos Exposure, Surgery, Treatment, Tunica Vaginalis Testis, Type of Assessment:, Type of Mesothelioma: | No Comments »
May 23rd, 2008. Primary peritoneal mesotheliomas in children: a clinicopathological and immunohistochemical study of eight cases
Conclusions: Peritoneal malignant mesothelioma in children is a rare condition that can introduce difficulties in histopathological diagnosis.
Posted in Biphasic or Mixed, Case Study, Chemotherapy, Diagnosis & Differentiation, Epithelioid, Full Archive, Immunohistochemistry or IHC, Peritoneal (Abdominal Mesothelioma), Sarcomatoid, Survival, Treatment, Type of Assessment:, Type of Mesothelioma: | No Comments »
April 30th, 2008. The value of occult disease in resection margin and lymph node after extrapleural pneumonectomy for malignant mesothelioma
Conclusions: In malignant pleural mesothelioma, the presence of occult disease in resection margins and lymph nodes can be identified by immunohistochemistry and significantly influences the prognosis. Cervical mediastinoscopy is useful in all patients considered for radical resection, but all specimens should be processed with immunohistochemical staining.
Posted in Biphasic or Mixed, Determining Efficacy, Diagnosis & Differentiation, Epithelioid, Extrapleural Pneumonectomy (EPP), Full Archive, Immunohistochemistry or IHC, Pleural, Sarcomatoid, Staging, Surgery, Survival, Treatment, Type of Assessment:, Type of Mesothelioma: | No Comments »
April 24th, 2008. Serous borderline tumor of the paratestis
Ultrastructurally, the cells did not demonstrate any well-developed microvilli or secretory granules and immunohistochemical findings supported SBT of Müllerian type (ovarian epithelial type tumor), while excluding a papillary type of malignant mesothelioma. The lesion in the present case was concluded to be a testicular serous tumor of Müllerian type, similar to SBT of the ovary.
April 22nd, 2008. Pharmacokinetic Analysis of Malignant Pleural Mesothelioma—Initial Results of Tumor Microcirculation and its Correlation to Microvessel Density (CD-34)
Conclusions: DCE-MRI and IHC can be used in patients with MM to visualize tumor microvascularity and to characterize tumor heterogeneity. DCE-MRI and IHC results positively correlated, though moderately, but these two methods present as essential tumor biomarkers. This multimodal characterization may be useful in selecting possible tumor subtypes that would benefit from antiangiogenic therapy.
April 16th, 2008. Work related mesothelioma: analysis of cases discovered at the Section for Occupational Medicine and Toxicology of Siena University during the years 2000-2007
Thus it is possible to find other malignant and nonmalignant asbestos-related diseases more frequently than mesothelioma. There is an evident risk in rebuilding, so the development of new cases due to these exposures is expected.
April 9th, 2008. Epidermal growth factor receptor gene mutation, amplification and protein expression in malignant pleural mesothelioma
In MPM, EGFR seems to play a role in a limited subset of patients. To identify possible candidates for EGFR tyrosine kinase in inhibitor therapy, the information on the EGFR gene status may be valuable.
Posted in Diagnosis & Differentiation, EGFR, Epithelioid, Full Archive, Immunohistochemistry or IHC, Kinase Inhibitors, New & Novel, Sarcomatoid, Treatment, Type of Assessment:, Type of Mesothelioma: | No Comments »
April 4th, 2008. Establishment of three novel human malignant pleural mesothelioma cell lines: morphological and cytogenetical studies and EGFR mutation status
Conclusion: FACS analysis is more sensitive for evaluating mesothelin expression than immunohistochemistry of cut specimens. Irrespective of the expression of EGFR on FACS analysis, no EGFR mutation was detected. These three cell lines may be useful for studying cellular, molecular and genetic aspects of mesothelioma.
April 4th, 2008. The diagnostic value of Ki-67 and repp86 in distinguishing between benign and malignant mesothelial proliferations
Conclusions: Used in combination, Ki-67 and repp86 appear to be useful markers in differentiating MM from benign reactive MH.
April 1st, 2008. Impact of tumor-infiltrating T cells on survival in patients with malignant pleural mesothelioma
Conclusion: The presence of high levels of CD8+ tumor-infiltrating lymphocytes is associated with better prognosis in patients undergoing extrapleural pneumonectomy for malignant pleural mesothelioma. The stimulation of CD8+ lymphocytes can be a potential therapeutic strategy to improve outcome.
Posted in Diagnosis & Differentiation, Extrapleural Pneumonectomy (EPP), Full Archive, Immune-based Therapies, Immunohistochemistry or IHC, Pleural, Surgery, Survival, Treatment, Type of Assessment:, Type of Mesothelioma: | No Comments »
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.
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