WordNet

tumor (usually benign) of the sheath surrounding a nerve
any bundle of nerve fibers running to various organs and tissues of the body (同)nervus
a protective covering (as for a knife or sword)
an enveloping structure or covering enclosing an animal or plant organ or part (同)case
protective covering consisting, for example, of a layer of boards applied to the studs and joists of a building to strengthen it and serve as a foundation for a weatherproof exterior (同)overlay, overlayer
enclosed in a protective covering; sometimes used in combination; "his sheathed sword"; "the cats sheathed claws"; "a ships bottom sheathed in copper"; "copper-sheathed"
an abnormal new mass of tissue that serves no purpose (同)tumour, neoplasm

PrepTutorEJDIC

〈C〉『神経』 / 〈C〉《複数形で》『神経過敏』,いらだち / 〈U〉『勇気』,度胸(courage) / 〈U〉《時にa ~》厚かましさ,ずぶとさ;無礼 / 〈C〉葉脈;(昆虫の)翅脈(しみゃく) / 〈人,特に自分〉‘に'力を与える,‘を'元気づける
(刀などの)さや / (動・植物のある部分をおおう)さや;(ケーブルの)鎧装(がいそう)など・体にぴったり合った女性の衣服
さやに納めること / おおい,被覆

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/06/16 10:25:22」(JST)

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A nerve sheath tumor is a type of tumor of the nervous system (nervous system neoplasm) which is made up primarily of the myelin surrounding nerves.

A peripheral nerve sheath tumor (PNST) is a nerve sheath tumor in the peripheral nervous system.

Benign peripheral nerve sheath tumors include schwannomas and neurofibromas.^[2]

A malignant peripheral nerve sheath tumor (MPNST) is a cancerous peripheral nerve sheath tumor.

References[edit]

^ http://ccrcal.org/PDF/CNSICD-O-3Codes.pdf
^ "Spinal Cord Tumors -- Nerve Sheath Tumors (Schwannomas and Neurofibromas)". Retrieved 2007-08-06.

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1. 末梢神経腫瘍 peripheral nerve tumors
2. 硬膜内神経鞘腫 intradural nerve sheath tumors
3. 脊髄腫瘍 spinal cord tumors
4. 孤立性線維性腫瘍 solitary fibrous tumor
5. 神経線維腫症I型（NF1）：病因、臨床的特徴、および診断 neurofibromatosis type 1 nf1 pathogenesis clinical features and diagnosis

English Journal

Foreign Body Abscess Mimicking a Malignant Peripheral Nerve Sheath Tumor in a Patient With Neurofibromatosis Type 1.

Salamon J1, Hagel C, Friedrich RE, Mautner VF, Derlin T.
Clinical nuclear medicine.Clin Nucl Med.2015 Aug;40(8):674-5. doi: 10.1097/RLU.0000000000000824.
We report a case of a 47-year-old man with neurofibromatosis type 1 presenting with a growing and painful lesion within the right thigh, suggesting a malignant peripheral nerve sheath tumor. MRI showed a T2-weighted hyperintense lesion with surrounding edema and contrast enhancement. F-FDG PET/CT de
PMID 26018702

Malignant Peripheral Nerve Sheath Tumor With Rhabdomyosarcomatous and Glandular Elements: Rare Epithelial Differentiation in a Triton Tumor.

Thway K1, Hamarneh W2, Miah AB2, Fisher C2.
International journal of surgical pathology.Int J Surg Pathol.2015 Aug;23(5):377-83. doi: 10.1177/1066896915583996. Epub 2015 Apr 24.
Divergent differentiation occurs in a subset of malignant peripheral nerve sheath tumors (MPNST), but differentiation toward epithelial elements is unusual. MPNST with both heterologous rhabdomyosarcomatous differentiation (malignant Triton tumor), and glandular epithelial differentiation is exceedi
PMID 25911565

Remote acute demyelination after focal proton radiation therapy for optic nerve meningioma.

Redjal N1, Agarwalla PK2, Dietrich J3, Dinevski N3, Stemmer-Rachamimov A4, Nahed BV2, Loeffler JS5.
Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia.J Clin Neurosci.2015 Aug;22(8):1367-9. doi: 10.1016/j.jocn.2015.02.017. Epub 2015 Apr 27.
We present a unique patient with delayed onset, acute demyelination that occurred distant to the effective field of radiation after proton beam radiotherapy for an optic nerve sheath meningioma. The use of stereotactic radiotherapy as an effective treatment modality for some brain tumors is increasi
PMID 25937571