Menière disease is one of the most common inner ear and balance system disorders. It is characterized by episodes of vertigo, low-pitched tinnitus, fullness in the ear and sensorineural hearing loss. It is usually unilateral but may be bilateral, as well.
Idiopathic endolymphatic hydrops is synonymous with Menière disease. Endolymphatic hydrops is a disorder of the peripheral vestibular system in which endolymphatic fluid balance in the labyrinth becomes dysregulated, leading to distension of the endolymphatic space (hydrops).
Symptoms are episodic but are often quite severe and include vertigo, nausea/vomiting, auditory changes, auditory pressure/fullness, and imbalance.