alexa Neuroendocrine marker expression in thyroid epithelial tumors.
Clinical Research

Clinical Research

Journal of Clinical Case Reports

Author(s): Satoh F, Umemura S, Yasuda M, Osamura RY

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Abstract Tissue sections from 50 cases with thyroid tumors, composed of 11 follicular adenomas, 10 follicular carcinomas, 14 papillary carcinomas, 10 anaplastic carcinomas, and 5 medullary carcinomas, were immunohistochemically analyzed for representative neuroendocrine markers. Immunoexpression ratios of these neuroendocrine markers were as follows: Follicular adenomas, neuron-specific enolase (NSE)63.6\%, synaptophysin (SynP) 45.5\%, Leu7 27.3\%, NCAM 45.5\%, chromogranin A (CgA) 0\%, SNAP25 0\%; follicular carcinomas, NSE 90.0\%, SynP 80.0\%, Leu7 80.0\%, NCAM 0\%, CgA 0\%, SNAP25 0\%; papillary carcinomas, NSE 85.7\%, SynP 78.6\%, Leu7 100\%, NCAM 7.0\%, CgA 0\%, SNAP25.0\%; anaplastic carcinomas, NSE 10.0\%, SynP 0\%, Leu7 0\%, NCAM 0\%, CgA 0\%, SNAP25 0\%; medullary carcinomas, NSE 100\%, SynP100\%, Leu7 80.0\%, NCAM 40.0\%, CgA 100\%, SNAP25 100\%. The two follicular carcinomas, which were morphologically characterized by "insular" (or "alveolar") arrangements, showed distinct immunoexpression of NSE and SynP at the same time. By in situ hybridization (ISH), expression of mRNA for NSE was confirmed in cases with marked immunoexpression of NSE. Although no endocrine granules were found, our results suggested that a specific type of follicular carcinoma, i.e., insular variant, may be immaturely neuroendocrine-differentiated.
This article was published in Endocr Pathol and referenced in Journal of Clinical Case Reports

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