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Expression of 'visceral' cytokeratin and ultrastructural findings in solid cell nests of the thyroid


Acta Anatomica 129(4): 289-292
Expression of 'visceral' cytokeratin and ultrastructural findings in solid cell nests of the thyroid
Solid cell nests of the thyroid display histological features that resemble squamous epithelium. In the present study we investigated whether these ultimobranchial nests express a renal tubular cell cytokeratin which is found to be widely distributed in epithelia but does not appear in squamous tissue. All 17 solid cell nests studied, in contrast to squamous epithelium lining an intrathyroid thyroglossal cyst, stained positively for this intermediate filament. These findings, together with the gland-like features shown ultrastructurally by these ultimobranchial remnants, further support the view that solid cell nests of the thyroid should not be regarded as a kind of intrathyroid squamous inclusion. In addition, they were electron-microscopically comparable to mammalian ultimobranchial tissue.


Accession: 005432430

PMID: 2442951



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