Adenoid
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The adenoid, also known as the pharyngeal tonsil, or nasopharyngeal tonsil is the superior-most of the tonsils. It is a mass of lymphoid tissue located behind the nasal cavity, in the roof and the posterior wall of the nasopharynx, where the nose blends into the throat. In children, it normally forms a soft mound in the roof and back wall of the nasopharynx, just above and behind the uvula. The term adenoid is also used in anatomy to represent adenoid hypertrophy, the abnormal growth of the pharyngeal tonsils.
The adenoid, also known as the pharyngeal tonsil, or nasopharyngeal tonsil is the superior-most of the tonsils. It is a mass of lymphoid tissue located behind the nasal cavity, in the roof and the posterior wall of the nasopharynx, where the nose blends into the throat. In children, it normally forms a soft mound in the roof and back wall of the nasopharynx, just above and behind the uvula. The term adenoid is also used in anatomy to represent adenoid hypertrophy, the abnormal growth of the pharyngeal tonsils.
Structure
The adenoid is a mass of lymphoid tissue located behind the nasal cavity, in the roof and the posterior wall of the nasopharynx, where the nose blends into the throat. The adenoid, unlike the palatine tonsils, has pseudostratified epithelium. The adenoids are part of the so-called Waldeyer ring of lymphoid tissue, which also includes the palatine tonsils, the lingual tonsils, and the tubal tonsils.
Clinical significance
Adenoid facies
Adenoid facies is an atypical appearance of the face caused by enlargement of the adenoid, found especially in children. Features of adenoid facies include mouth breathing, an elongated face, prominent incisors, hypoplastic maxilla, short upper lip, elevated nostrils, and a high arched palate.
External links
Adenoids: What They Are, How to Recognize Them, What to Do for Them Histology at usuhs.mil Histology at udel.edu ( ) Adenoid by Dr. T. Balasubramanian M.S. D.L.O. at drtbalu.com
Text derived from https://en.wikipedia.org/w/index.php?oldid=1341004883 under CC BY-SA 4.0; modifications have been made.