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Published on: May 29, 2017
Expression of p63 in thymomas and normal thymus
Jorge Dotto1, Giuseppe Pelosi, Juan Rosai
1Department of Pathology, Yale-New Haven Hospital, Yale University School of Medicine, New Haven, CT, USA.
American Journal of Clinical Pathology
|February 6, 2007
Summary
p63 protein is expressed in most epithelial cells of normal thymus and all thymomas, including thymic carcinomas. This finding highlights p63 as a potential marker in thymic epithelial neoplasms.
Area of Science:
- Oncology
- Molecular Biology
- Immunohistochemistry
Background:
- The p63 gene, part of the p53 family, is a known epithelial marker.
- DeltaN-p63 isoforms are implicated as oncogenes in various carcinomas.
- Limited research exists on p63 expression in thymomas and normal thymus.
Purpose of the Study:
- To investigate the expression of p63 in a cohort of thymomas and normal thymus specimens.
- To determine if p63 expression varies across different thymoma subtypes.
Main Methods:
- Tissue microarrays were constructed from 66 thymoma cases (Types A, AB, B1, B2, B3, and C/thymic carcinoma) and 10 normal thymus specimens.
- Immunohistochemistry was employed to detect p63 expression.
Main Results:
- All thymoma cases, including thymic carcinomas, showed positivity for p63.
- The majority of epithelial cells in normal thymus specimens also expressed p63.
- p63 expression was observed across all thymoma subtypes studied.
Conclusions:
- p63 is consistently expressed in thymomas and normal thymus.
- p63 serves as a reliable epithelial marker in the thymus.
- The consistent p63 expression suggests its potential utility as a diagnostic or prognostic marker in thymic epithelial lesions.
