![]() This canal is approximately 2 cm (0.8 inches) long and it is generally here that acoustic neuromas originate from the sheath surrounding the eighth nerve. The eighth nerve, along with the facial or seventh cranial nerve, lie adjacent to each other as they pass through a bony canal called the internal auditory canal.This nerve has two distinct parts, one part associated with transmitting sound and the other with sending balance information to the brain from the inner ear. ![]() An acoustic neuroma, known as a vestibular schwannoma, is a benign (non-cancerous) growth that arises on the eighth cranial nerve leading from the brain to the inner ear.The tumor usually arises from the vestibular division of the vestibulocochlear nerve, rather than the cochlear division and it is derived from the Schwann cells of the associated nerve, rather than the actual neurons (neuromas). When a schwannoma develops in the Schwann cells of the eighth cranial nerve - also called the vestibulocochlear or acoustic nerve because it connects the ear to the brain - it is called a vestibular schwannoma (or acoustic neuroma). Schwann cells are the building blocks of that myelin, so schwannomas can develop anywhere Schwann cells are present. While the terms acoustic neuroma and vestibular schwannoma have been used interchangeably it is more pathologically correct that their name should reflect their nerve of origin and histopathology – hence the term vestibular schwannoma (VS).Ī schwannoma, also known as a Schwann cell tumor, is a benign tumor that develops in the protective sheathing surrounding the nerve cells, called myelin. With improved histopathology, they were determined to arise from the vestibular nerve, but the name acoustic neuroma stuck. Originally these tumors were thought to arise from the cochlear (acoustic) nerve. The choice of treatment may be based on tumor size, hearing in the ear at time of diagnosis, patient age and health, and patient preference.Īcoustic Neuroma vs. The treatment options are observation (wait-and-scan), surgical removal, or radiation therapy. ![]()
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