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Effects of vitamin a deficiency on ultimobranchial cysts in the thyroid gland

An electron microscopic study

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Summary

Ultimobranchial cysts in the thyroid glands of rats receiving a diet adequate in vitamin A are lined with stratified squamous epithelium and contain non-keratinized cellular debris. The epithelium of these cysts in vitamin A deficient animals is keratinized, and their lumina contain keratinized cellular strands surrounding a core of cellular debris. Upon return to a diet adequate in vitamin A the epithelium returns to a non-keratinized state, and the lumina contain keratinized strands surrounded by cell fragments and desquamated whole cells. Occasionally these cysts have an epithelium that is highly irregular in appearance. The relationship of alterations in this tisssue to possible subsequent development of neoplasias is discussed.

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Authors and Affiliations

  1. Department of Anatomy, University of Vermont College of Medicine, Burlington, Vermont, USA

    P. P. Krupp Ph.D. & R. Frink

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  1. P. P. Krupp Ph.D.
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  2. R. Frink
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Krupp, P.P., Frink, R. Effects of vitamin a deficiency on ultimobranchial cysts in the thyroid gland. Cell Tissue Res. 190, 181–185 (1978). https://doi.org/10.1007/BF00210047

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  • DOI: https://doi.org/10.1007/BF00210047

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