Surface irradiation of the eustachian tube.
D002908:Chronic Disease; D002921:Cicatrix / Q000532:radiotherapy; D005064:Eustachian Tube / Q000528:radiation effects*; D006801:Humans; D010033:Otitis Media / Q000532:radiotherapy*; D010040:Otosclerosis / Q000532:radiotherapy*; D011300:Preoperative Care; D011830:Radiation Effects; D011879:Radiotherapy Dosage; D014433:Tympanoplasty