Otolaryngology - Head and Neck Surgery
Otology and Neurotology (Ear Surgery)
About the eustachian tube
The eustachian tube begins in the nasopharynx, which is above and behind the soft palate, and extends to the middle ear.

The eustachian tube opens periodically to equalize the pressure in the middle ear. A malfunction of the eustachian tube may cause problems in the middle ear or the mastoid.
Some of these problems include:
Children with some middle ear problems may "outgrow" the difficulty as the Eustachian tube matures.
Ear surgery specialty page.
About ear anatomy.
About ear diseases and treatments.