"Adeno" refers to the adenoids, and "adenoidosis" is inflamation of the adenoids (either of two abnormally enlarged masses of lymphoid tissue at the back of the pharynx that usually obstruct the nasal and ear passages). So I believe "adenotonisillitis" would be tonsillitis with the adenoids infected, too, which can be very painful.
Adenotonsillitis is inflammation of the tonsils and adenoids.
Adenotonsillitis is an infection of both the adenoids and the tonsils which are found in the back of the mouth and on either side. Many times this condition can be chronic.
Adenotonsillitis is inflammation of the tonsils and adenoids.
Inflammation of a lymph node or a gland