Meniere’s disease is characterized by
**Core Concept**
Meniere's disease is a disorder of the inner ear that affects balance and hearing. It is characterized by a triad of symptoms: vertigo, tinnitus, and hearing loss, particularly in the low-frequency range.
**Why the Correct Answer is Right**
Meniere's disease is caused by an abnormality in the endolymphatic sac, which is a structure responsible for regulating the balance of fluids in the inner ear. The disease is thought to result from an overproduction of endolymph, leading to an increase in pressure within the inner ear. This increased pressure causes damage to the hair cells in the cochlea, resulting in hearing loss and tinnitus. The vertigo experienced by patients with Meniere's disease is thought to be due to the stimulation of the vestibular apparatus by the abnormal endolymph.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Meniere's disease does not primarily involve inflammation of the middle ear.
**Option B:** This option is incorrect because Meniere's disease is not caused by a viral infection.
**Option C:** This option is incorrect because Meniere's disease is not primarily characterized by a loss of hearing in the high-frequency range.
**Clinical Pearl / High-Yield Fact**
It is essential to note that Meniere's disease often has a fluctuating course, with periods of exacerbation and remission. A thorough history and physical examination are crucial in diagnosing this condition, and treatment options may include medications to reduce symptoms, as well as procedures to alleviate vertigo.
**Correct Answer:** D. Endolymphatic hydrops, characterized by a triad of vertigo, tinnitus, and hearing loss.