It is a mass of lymphoid tissue located behind the nasal cavity, in the roof and the posterior wall of the nasopharynx,[1] 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.

[2] The adenoid is a mass of lymphoid tissue located behind the nasal cavity, in the roof and the posterior wall of the nasopharynx,[1] where the nose blends into the throat.

[5] Features of adenoid facies include mouth breathing, an elongated face, prominent incisors, hypoplastic maxilla, short upper lip, elevated nostrils, and a high arched palate.

[7] Carried out through the mouth under a general anaesthetic (or less commonly a topical), adenoidectomy involves the adenoid being curetted, cauterized, lasered, or otherwise ablated.