pharyngeal pouches


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pha·ryn·ge·al pouch·es

paired evaginations of embryonic pharyngeal endoderm, between the pharyngeal arches, extending toward the corresponding ectodermally lined pharyngeal grooves; during development they evolve into epithelial tissues and organs, such as thymus and thyroid glands.
Synonym(s): branchial pouches, endodermal pouches

pharyngeal pouches,

n.pl the four pairs of evaginations from the lateral walls lining the pharynx between the branchial arches in a developing embryo.
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References in periodicals archive ?
Older theories hold that they are congenital abnormalities caused by an incomplete obliteration of pharyngeal pouches.
A case of papillary carcinoma arising in ectopic thyroid tissue within a branchial cyst with neck node metastasis
2) The thymus is derived from the third and fourth pharyngeal pouches.
Ectopic subglottic thymic cyst: a rare cause of congenital stridor
When they do occur, they typically arise from the parotid gland and the first and second pharyngeal pouches.
A new case of a branchial cyst of the parapharyngeal space

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