Which among the following is not true about otosclerosis?: (A) Hearing better in louder conditions, (B) Eustachian tube is always abnormal, (C) Tympanic membrane is normal, (D) Bilateral progressive conduction deafness
Answer is B. Otosclerosis- Enchondral bone conve to spongy bone (Fissula ante fenestrum is mc site )- Conductive Hearing loss- Paracusis willsi - patient hear better in noisy - Eustachian tube is normal- Carha's notch - dip at 2000hz