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About: Schwannoma     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatPeripheralNervousSystemDisorders, within Data Space : dbpedia.org associated with source document(s)

Type: ThingDiseaseyago:WikicatCutaneousConditionsyago:Abstraction100002137yago:Attribute100024264yago:Condition113920835yago:Disease114070360yago:Disorder114052403yago:IllHealth114052046yago:Illness114061805yago:PathologicalState114051917yago:PhysicalCondition114034177diseaseyago:State100024720yago:WikicatPeripheralNervousSystemDisorders New Facet based on Instances of this Class

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. The tumor cells always stay on the outside of the nerve, but the tumor itself may either push the nerve aside and/or up against a bony structure (thereby possibly causing damage). Schwannomas are relatively slow-growing. For reasons not yet understood, schwannomas are mostly benign and less than 1% become malignant, degenerating into a form of cancer known as neurofibrosarcoma. These masses are generally contained within a capsule, so surgical removal is often successful.