The base of tongue is the site for the posterior opening of the oral cavity, the entrance of the pharynx and esophagus, and the inferior aspect of the nasopharynx .The surgical management of malignant neoplasms of the tongue base remains difficult despite recent advances in diagnostic techniques.ny alteration in tongue and pharynx mobility is immediately recognized as altered speech. Any loss of tissue from the base of tongue area prevents a watertight closure with the larynx during the act of swallowing.