 Eustachian tube ET comprises an osseous intratemporal portion and a cartilaginous nasopharyngeal portion. It functions in pressure equalization, middle ear protection and clearance. Eustachian tube function can be adversely affected by viral and bacterial infections, adenoid disease, craniofacial anomalies, neoplasm, genetic predisposition, sinonasal disease and gastroesophageal reflux, leading to Eustachian tube dysfunction. 