Adenoid hypertrophy is the abnormal enlargement of the adenoid glands located in the back of the nose and throat. This condition can obstruct the airway, leading to symptoms such as difficulty breathing, snoring, and recurrent sinus or ear infections. Treatment may involve medications, surgical removal of the adenoids, or other interventions depending on the severity of symptoms.

narrowing of the pulmonary vessels due to decreased oxygen and increased carbon dioxide

1. There is only one pharyngeal tonsil, even though it's often referred to in the plural sense, and when it becomes infected (or hypertrophy) it is then called an adenoid. So only one adenoid.

Adenoidal hypertrophy is overgrowth of the adenoids.

The suffix for adenoid is -oid, which means resembling or shaped like.