Parathyroid Glands The four parathyroid glands, derived from pharyngeal pouches III and IV, are found on the surface of the thyroid gland and consist of chief cells and oxyphilic
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Ultrastructure of the parathyroid gland.
Since the first detailed description of the parathyroid glands, reported in human beings by Sandstrom in 1880, and Lever first described the ultrastructure of the parathyroid chief cells of rat in 1957, a large number of histological and ultrastructural studies have been done on the parathyroid glands of numerous animal species under normal and experimental conditions. The biological function o...
متن کاملAn Update on the Structure of the Parathyroid Gland
The parathyroid glands hold a special place in human anatomy, since they were the last major organ to be recognized by humans. The glands are recognized in all vertebrate animals higher than fish, and are derived from the pharyngeal pouches. The molecular signaling pathways that are involved in determining the differentiation of the glands are being elucidated. Studies in mice have demonstrated...
متن کاملResponse of Ultimobranchial and Parathyroid Glands of the Indian Skipper Frog, Euphlyctis cyanophlyctis to Cadmium Toxicity
Background: Cadmium toxicity has been shown in aquatic animals but the effect on frog’s endocrine glands is not known. We investigated the effects of cadmium on ultimobranchial and parathyroid glands of Indian skipper frog, Euphlyctis cyanophlyctis. Methods: Frogs were exposed to cadmium chloride for short and long terms and sacrificed after 24, 48, 72 or 96 h (short-term) and after 5, 10, 1...
متن کاملMitochondrial DNA mutations in oxyphilic and chief cell parathyroid adenomas
BACKGROUND The potential pathogenetic significance of mitochondrial DNA (mtDNA) mutations in tumorigenesis is controversial. We hypothesized that benign tumorigenesis of a slowly replicating tissue like the human parathyroid might constitute an especially fertile ground on which a selective advantage conferred by mtDNA mutation could be manifested and might contribute to the oxyphilic phenotype...
متن کاملAbsent radiotracer uptake in thyroid gland in parathyroid scintigraphy with 99mTc-MIBI: A case report
Localization of 99mTc- hexakis-2-methoxyisobutylisonitrile (99mTc-MIBI) by parathyroid adenomas is well known, and this warrants MIBI scan to evaluate suspected parathyroid adenoma in primary hyperparathyroidism. Typically, the radionuclide concentrates in both the thyroid gland and parathyroid adenoma in early images, and later on delayed images washes out slowly from the...
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تاریخ انتشار 2010