A 31-year-old female patient complains of bilateral Impairment of hearing for the past 5 years. On examination, tympanic membrane (TM) is normal and audiogram shows a bilateral conductive loss. Impedance audiometry shows AS type of curve and absent acoustic reflex. All constitute part of treatment except:

## **Core Concept**
The patient's symptoms and test results suggest a diagnosis of otosclerosis, a condition characterized by abnormal bone growth in the middle ear that causes hearing loss. The key findings include bilateral conductive hearing loss, a normal tympanic membrane, an AS (or type A with a shift) tympanogram, and absent acoustic reflex. These are typical for otosclerosis.

## **Why the Correct Answer is Right**
Otosclerosis is a condition where abnormal bone growth occurs in the middle ear, specifically around the stapes bone, leading to fixation of the stapes and conductive hearing loss. The treatment options often include medical management, hearing aids, and surgery. The correct answer relates to the management options for otosclerosis.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is not provided, but typically, treatments like hearing aids or medical management (e.g., sodium fluoride) are considered.
- **Option B:** Similarly, this option is not provided, but surgical intervention, such as stapedotomy or stapedectomy, is a definitive treatment.
- **Option C:** Without the specific details, we assume this could relate to a treatment or management strategy that is actually used in otosclerosis.
- **Option D:** This option is marked as the correct answer, implying it is not part of the treatment.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl in otosclerosis is that the condition often presents with a conductive hearing loss, a normal tympanic membrane, and an AS tympanogram. A significant treatment option is surgical intervention, specifically stapedotomy, which has a high success rate in improving hearing.

## **Correct Answer: D.**

✓ Correct Answer: D. Gentamicin therapy