**Core Concept**
Endolymphatic decompression is a surgical procedure aimed at alleviating inner ear pressure and reducing symptoms of Meniere's disease. This condition is characterized by a disorder of the inner ear's endolymphatic system, leading to episodes of vertigo, tinnitus, hearing loss, and aural fullness.

**Why the Correct Answer is Right**
Endolymphatic decompression involves the surgical removal of part of the sac surrounding the endolymphatic duct, thereby reducing pressure on the inner ear and alleviating symptoms of Meniere's disease. The procedure is usually performed on patients with severe, intractable symptoms who have failed conservative management. The reduction in endolymphatic sac pressure is thought to promote the absorption of excess endolymph and restore balance to the inner ear.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because endolymphatic decompression is not typically performed for acoustic neuroma or other vestibular schwannomas. These conditions often require a different surgical approach, such as vestibular nerve section or tumor resection.
**Option B:** This option is incorrect because endolymphatic decompression is not a treatment for sudden sensorineural hearing loss. Treatment for this condition usually involves corticosteroids and other medications to promote hearing recovery.
**Option C:** This option is incorrect because endolymphatic decompression is not a treatment for benign paroxysmal positional vertigo (BPPV). Treatment for BPPV usually involves maneuvers such as the Epley maneuver to move the otoliths out of the posterior semicircular canal.

**Clinical Pearl / High-Yield Fact**
A key consideration when performing endolymphatic decompression is the need to minimize damage to the surrounding inner ear structures, as this can exacerbate symptoms or lead to further hearing loss. The procedure should only be performed by experienced otolaryngologists or neurotologists in a controlled clinical environment.

**Correct Answer:** D.