A man Rajan, age 70 yrs, presents with tinnitus. Most probable diagnosis is –
**Core Concept**
Age-related hearing loss, also known as presbycusis, is a progressive condition affecting the auditory system, commonly presenting with tinnitus and hearing impairment. This condition is characterized by degeneration of the inner ear structures, including the cochlea and auditory nerve.
**Why the Correct Answer is Right**
The degeneration of the inner ear structures in presbycusis is due to the accumulation of noise-induced damage over a lifetime. This damage leads to a decrease in the sensitivity of the hair cells in the cochlea, resulting in hearing impairment. Tinnitus is a common symptom of presbycusis, often described as a ringing or buzzing sound in the affected ear. The pathophysiology involves the loss of the normal inhibitory influences of the auditory nerve on the central nervous system, leading to the perception of abnormal sounds.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Meniere's disease typically presents with vertigo, hearing loss, tinnitus, and aural fullness, but it is more common in younger individuals and is characterized by endolymphatic hydrops.
**Option B:** This option is incorrect because Otosclerosis is a condition characterized by abnormal bone growth in the middle ear, leading to hearing loss. However, it typically presents with conductive hearing loss and a unilateral hearing loss pattern.
**Option C:** This option is incorrect because Acoustic Neuroma is a benign tumor of the vestibulocochlear nerve, which can cause unilateral hearing loss, tinnitus, and vertigo. However, it is relatively rare and often presents with other symptoms such as facial weakness.
**Clinical Pearl / High-Yield Fact**
Presbycusis is the most common cause of hearing impairment in older adults, and its prevalence increases with age. Early recognition and management of presbycusis are essential to improve the quality of life for affected individuals.
**Correct Answer:** D. Presbycusis.