ultimobranchial body

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ultimobranchial body

[¦əl·tə·mō′braŋ·kē·əl ′bäd·ē]
(embryology)
One of the small, endocrine structures which originate as terminal outpocketings from each side of the embryonic vertebrate pharynx; can produce the hormone calcitonin.
References in periodicals archive ?
Recently, lack of PAX8 expression and positivity for GATA-3 were also defined in solid cell nests, common ultimobranchial body remnants that can sometimes present with hyperplastic proliferations in the thyroid gland.
When the developing thyroid reaches its final position at the base of the neck in front of the trachea, the fusion of the ultimobranchial bodies takes place to give rise to C cells.
Common cytochemical and ultrastructural characteristics of cells producing polypeptide hormones (the APUD series) and their relevance to thyroid and ultimobranchial C cells and calcitonin.
TZ indicates the point of fusion of ultimobranchial body and principal median thyroid process.
Effects of the insecticide cypermethrin on plasma calcium and ultimobranchial gland of a teleost Heteropneustes fossilis.
The ultimobranchial gland and congenital thyroid abnormalities in man.
(1-4) Each arch is composed of ectoderm, which will form the epidermis and sensory neurons; the neural crest, from which will develop the skeletal and connective tissues; the mesoderm, from which will arise the musculature and endothelial cells; and the endoderm, which will form the epithelial lining of the pharynx, the taste buds, the thyroids, parathyroids, ultimobranchial glands, and thymus?
C cells are neural crest-derived cells arising from ultimobranchial bodies.
The second group consists of carcinoma arising from parafollicular cells of ultimobranchial body of neural crest, which is the medullary carcinoma.
C cells arise from the ultimobranchial body, which is derived from the fourth pharyngeal pouch, and they are found in the upper and middle areas of the thyroid lobes.