(pharyngeal tonsil) A tonsil in the mucosa of the nasopharynx.

(adenoids) A collection of lymphoid nodules on the posterior wall and roof of the NASOPHARYNX.

(adenoids) Adenoids are a patch of tissue that is high up in the throat, just behind the nose. They, along with the tonsils, are part of the lymphatic system. The lymphatic system clears away infection and keeps body fluids in balance. The adenoids and tonsils work by trapping germs coming in through the mouth and nose. Adenoids usually start to shrink after about age 5. By the teenage years, they are almost completely gone. By then, the body has other ways to fight germs. Enlarged adenoids are adenoids that are swollen. It is a common problem in children. Your child's adenoids can be enlarged, or swollen, for different reasons. It may just be that your child had enlarged adenoids at birth. Adenoids can also become enlarged when they are trying to fight off an infection. They might stay enlarged even after the infection is gone. Enlarged adenoids can make it hard to breathe through the nose. Your child might end up breathing only through the mouth. This may cause: A dry mouth, which can also lead to bad breath; Cracked lips; A runny nose. Other problems that enlarged adenoids can cause include: Loud breathing; Snoring; Restless sleep; Sleep apnea, a disorder that causes you to repeatedly stop breathing during sleep; Ear infections. To find out if your child has enlarged adenoids, the health care provider will: Ask about your child's medical history, including asking about your child's symptoms; Check your child's ears, throat, and mouth; Feel your child's neck. Since the adenoids are higher up than the throat, the provider cannot see them just by looking through your child's mouth. To check the size of your child's adenoids, your provider may use: A special mirror in the mouth; A long, flexible tube with a light (an endoscope); An x-ray. The treatment depends on what is causing the problem. If the symptoms are not too bad, your child may not need treatment. If treatment is needed, your child may get nasal spray to reduce the swelling or antibiotics if the provider thinks that there is a bacterial infection. In some cases, your child may need an adenoidectomy. An adenoidectomy is surgery to remove the adenoids. The provider may recommend this surgery if: Your child has repeated infections of the adenoids. Sometimes the infections can also cause ear infections and fluid buildup in the middle ear.; Taking antibiotics doesn't get rid of a bacterial infection of the adenoids.; The enlarged adenoids block the airways. If there is also a problem with the tonsils, your child will probably have a tonsillectomy (removal of the tonsils) at the same time that the adenoids are removed. After having the surgery, your child usually goes home the same day. Your child will probably have some throat pain, bad breath, and a runny nose. It can take several days to feel all better.

(pharyngeal tonsil) A fold of lymphatic tissue covered by ciliated epithelium at the very back of the nose, in the roof of the nasopharynx.

(pharyngeal tonsil) Tonsil, each instance of which is some mass of lymphoid tissue in the roof and posterior wall of some nasopharynx.

Adenoids, a mass of lymphatic tissue, similar to the (palatine) tonsils, that is attached to the back wall of the nasal pharynx (i.e., the upper part of the throat opening into the nasal cavity proper). An individual fold of such nasopharyngeal lymphatic tissue is called an adenoid. The surface...