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A vestibular schwannoma (VS), also called acoustic neuroma, is a benign tumor that develops on the vestibulocochlear nerve that passes from the inner ear to the brain. The tumor originates when Schwann cells that form the insulating myelin sheath on the nerve malfunction. Normally, Schwann cells function beneficially to protect the nerves which ...
Micrograph of a schwannoma, a tumor seen in neurofibromatosis type II. HPS stain. Schwannoma of the N. Vestibularis Meningiomas in a person with NFII. The so-called acoustic neuroma of NF2 is in fact a schwannoma of the nervus vestibularis, or vestibular schwannoma. The misnomer of acoustic neuroma is still often used.
An acoustic neuroma is a schwannoma on the vestibular nerve in the brain. This nerve is involved in hearing and patients with vestibular schwannomas experience hearing loss. However, bilateral vestibular schwannomas (vestibular schwannomas on both sides of the brain) do not occur in schwannomatosis. Juvenile vestibular tumors do not occur ...
The most common cerebellopontine angle (CPA) tumor is a vestibular schwannoma affecting cranial nerve VIII (80%), followed by meningioma (10%). The cranial nerves affected are (from most common to least common) : VIII (cochlear component), VIII (vestibular component), V Acoustic neuroma/vestibular schwannoma
This surgical approach is typically performed by a team of surgeons, including a neurotologist (an ear, nose, and throat surgeon specializing in skull base surgery) as well as a neurosurgeon. In this approach, the semicircular canals and vestibule , including the utricle and the saccule of the inner ear are removed with a surgical drill ...
Success rates are often reported as 70%. [20] [21] [22] Studies reporting on intercostal neurectomy often report cure rates (100% reduction in symptoms), even though it is not the primary success outcome. For example, patients may say they are cured or report pain scores of zero. There is a wide span of the reported cure rates, ranging from 22 ...
A schwannoma (or neurilemmoma) is a usually benign nerve sheath tumor composed of Schwann cells, which normally produce the insulating myelin sheath covering peripheral nerves. Schwannomas are homogeneous tumors, consisting only of Schwann cells.
Polycystic ovary syndrome, or polycystic ovarian syndrome (PCOS), is the most common endocrine disorder in women of reproductive age. [14] The syndrome is named after cysts which form on the ovaries of some women with this condition, though this is not a universal symptom, and not the underlying cause of the disorder.