Schwannoma
Schwannoma
Schwannoma (pronounced: shwah-NO-muh) is a type of tumor that originates from Schwann cells, the cells that produce the protective myelin sheath around peripheral nerves.
Etymology
The term "Schwannoma" is derived from the name of the German physiologist, Theodor Schwann, who first identified Schwann cells. The suffix "-oma" is derived from the Greek word "onkos", meaning bulk or mass, and is commonly used in medical terminology to denote a tumor.
Definition
Schwannomas are typically benign, slow-growing tumors that can occur anywhere in the body where there are peripheral nerves. They are most commonly found in the head and neck region, particularly the vestibular nerve, which is responsible for balance. This type of Schwannoma is often referred to as a vestibular schwannoma or acoustic neuroma.
Symptoms
The symptoms of a Schwannoma can vary depending on the location of the tumor. Common symptoms may include pain, numbness, or weakness in the area served by the affected nerve. In the case of a vestibular schwannoma, symptoms may also include vertigo, tinnitus, and hearing loss.
Diagnosis
Diagnosis of a Schwannoma typically involves a physical examination, a review of the patient's medical history, and imaging tests such as MRI or CT scan. A biopsy may also be performed to confirm the diagnosis.
Treatment
Treatment options for Schwannomas include observation, surgical removal, and radiation therapy. The choice of treatment depends on the size and location of the tumor, the patient's overall health, and the severity of the symptoms.
Related Terms
- Neurofibromatosis: A genetic disorder that causes tumors to form on nerve tissue. Schwannomas are often associated with a type of neurofibromatosis known as Neurofibromatosis type 2.
- Neurilemmoma: Another term for Schwannoma.
External links
- Medical encyclopedia article on Schwannoma
- Wikipedia's article - Schwannoma
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