The topic Cranial Nerve IX Schwannoma you are seeking is a synonym, or alternative name, or is closely related to the medical condition Glossopharyngeal Nerve Schwannoma.

Quick Summary:

• Schwannomas are mostly benign tumors that arise from the Schwann cells around the nerves; these tumors are nerve sheath tumors. Schwannomas involving the central nervous system (CNS) are classified as grade I tumors of the cranial and paraspinal nerves, according to the World Health Organization (WHO)
• WHO grade I brain tumors are the most benign of the brain tumors that are slow-growing and are not known to infiltrate into surrounding tissues. They offer a very high chance for surgery to be curative, and thus, have the best prognosis amongst all brain tumors; long-term survivals are usually noted
• A majority of schwannomas involve the cranial nerves, particularly cranial nerve VIII (causing vestibular schwannomas). Cranial nerves are 12 pairs of sensory and/or motor nerves having specific functions that connect parts of the head and neck region to the brain. Ten of these pairs originate from the brainstem; two pairs originate from the cerebrum
• Glossopharyngeal Nerve Schwannoma is an extremely rare form of schwannoma that involves the cranial nerve IX (CN IX), or the glossopharyngeal nerve. This nerve bundle serves both sensory and motor function; it arises from the medulla oblongata (in the brainstem) and is in close proximity to the vagus nerve (cranial nerve X)
• The ninth cranial nerve is partially responsible for the sense of taste, communicates sensory information from parts of the inner ear, throat, and tongue, to the brain, and it stimulates the stylopharyngeus muscle that aids in nasopharynx dilation
• Currently, no causative factors have been identified for Glossopharyngeal Nerve Schwannoma, although certain genetic, environmental, and occupational factors have been implicated in schwannoma development. It is reported that in a majority, the tumor is seen in the presence of neurofibromatosis (NF), which is a rare genetic disorder
• Glossopharyngeal Nerve Schwannomas may cause hearing impairment, hoarseness, mild headaches, and vagus nerve palsy, in some individuals. The involvement of multiple cranial nerves, especially the vagus nerve, is noted causing associated complications. Some individuals may also experience ataxia, walking difficulties, and facial palsy. In rare cases, the presence of malignant schwannomas may worsen the symptoms and outcomes
• Occasionally, the healthcare provider may undertake a ‘wait and watch’ approach for small-sized and slow-growing tumors. In many cases, a complete excision by surgery or treatment through Gamma Knife radiosurgery can be curative. The prognosis of Glossopharyngeal Nerve Schwannoma is typically good with appropriate management and follow-up care

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