Which of the following is a cause of conductive hearing loss?

• A. Acoustic neuroma
• B. Cerumen impaction
• C. Toxoplasmosis
• D. Meniere's disease

Answer: (B)

Conductive hearing loss occurs when there is an issue that prevents sound from being conducted properly through the outer ear canal, tympanic membrane (eardrum), or the ossicles (small bones) of the middle ear. This type of hearing loss often results from conditions that block or reduce the transmission of sound waves to the inner ear.

Cerumen impaction is a common cause of conductive hearing loss, as the buildup of earwax can obstruct the external auditory canal, preventing sound from reaching the eardrum. When the ear canal is blocked, it can lead to a decrease in sound waves entering, ultimately affecting hearing. Removal of the cerumen typically restores normal hearing.

Contrastingly, acoustic neuroma, toxoplasmosis, and Meniere's disease primarily involve issues related to the inner ear and auditory pathways rather than the outer or middle ear structures. Acoustic neuroma is a type of tumor that can affect the auditory nerve and lead to sensorineural hearing loss. Toxoplasmosis can impact the auditory system but more often leads to complications in other areas of the body. Meniere's disease is characterized by episodic vertigo, tinnitus, and fluctuating hearing loss primarily due to inner ear fluid imbalance, which is also associated with