Definition
A multifocal proliferation of thyroid C cells that results in more than 7 cells per cluster, follicles completely surrounded by C cells, and/or C cells extending beyond their normal at the junction of the upper third and lower two thirds of the lateral thyroid lobes, i.e., in the lower lobes (DeLellis et al. 2004; Wolfe et al. 1974). C cell hyperplasia may be primary or secondary; the former is usually nodular and premalignant (Mete and Asa 2013), whereas the latter is a diffuse nonnodular proliferation that is a reactive phenomenon and usually has no preneoplastic connotation but may also be seen in patients with chronic hypercalcemia or thyroiditis. C cell hyperplasia is also caused by some drugs, mainly antidiabetic incretins (glucagon-like peptide-1 analogs such as exenatide, liraglutide, and taspoglutide).
Clinical Features
Incidence
Primary C cell hyperplasia is a precursor lesion in patients with...
References and Further Reading
DeLellis, R. A., Lloyd, R. V., Heitz, P. U., & Eng, C. (2004). Pathology and genetics of Tumours of endocrine organs. Lyons: IARC Press.
Mete, O., & Asa, S. L. (2013). Precursor lesions of endocrine system neoplasms. Pathol, 45, 316–330.
Wells, S. A., Jr., Asa, S. L., Dralle, H., Elisei, R., Evans, D. B., Gagel, R. F., et al. (2015). Revised American Thyroid Association guidelines for the management of medullary thyroid carcinoma. Thyroid, 25, 567–610.
Wolfe, H. J., DeLellis, R. A., & Tashjian, A. H., Jr. (1974). Distribution of calcitonin-containing cells in the normal adult human thyroid gland: A correlation of morphology with peptide content. The Journal of Clinical Endocrinology and Metabolism, 38, 688–694.
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Asa, S.L. (2020). C-Cell Hyperplasia. In: van Krieken, J. (eds) Encyclopedia of Pathology. Encyclopedia of Pathology. Springer, Cham. https://doi.org/10.1007/978-3-319-28845-1_5033-1
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DOI: https://doi.org/10.1007/978-3-319-28845-1_5033-1
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