Nasopharyngeal carcinoma causes deafness by -a) Blocking the Eustachian tubeb) Serous otitis mediac) Temporal bone metastasisd) Radiation: (A) ab, (B) a, (C) ad, (D) bc
Answer is A. Nasopharyngeal carcinoma can cause obstruction of eustachian tube which results in serous otitis media and conductive deafness.