neurilemmoma


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Related to neurilemmoma: neurofibroma, schwannoma

neurilemmoma

schwan·no·ma

(shwah-nō'mă)
A benign, encapsulated neoplasm in which the fundamental component is structurally identical to a syncytium of Schwann cells; the neoplastic cells proliferate within the endoneurium, and the perineurium forms the capsule. The neoplasm may originate from a peripheral or sympathetic nerve, or from various cranial nerves, particularly the eighth nerve; when the nerve is small, it is usually found (if at all) in the capsule of the neoplasm; if the nerve is large, the neurilemmoma may develop within the sheath of the nerve, the fibers of which may then spread over the surface of the capsule as the neoplasm enlarges. Microscopically, neurilemmoma is composed of combinations of two patterns, Antoni types A and B, either of which may be predominant.
See also: neurofibroma
Synonym(s): neurilemmoma.
[Theodor Schwann + -oma]

neurilemmoma

A benign tumour of NEURILEMMA (Schwann cells) that may occur in any peripheral or CRANIAL NERVE or in a nerve of the sympathetic nervous system. Although non-malignant, neurilemmomas of such nerves as the acoustic nerve can be dangerous.

schwan·no·ma

(shwah-nō'mă)
A benign, encapsulated neoplasm in which the fundamental component is structurally identical to a syncytium of Schwann cells.
Synonym(s): neurilemmoma.

neurilemmoma

a tumor of a peripheral nerve sheath (neurilemma); called also schwannoma. Occur as small subcutaneous tumors on the head of goldfish.

Patient discussion about neurilemmoma

Q. Anybody familiar with schwannoma?

A. A schwannoma is a kind of tumor originating from the Schwann cells. The insulating myelin sheath which covers peripheral nerves is produced by the Schwann cells. Hence, one kind of tumor originating from the Schwann cells is called a schwannoma.

Schwannomas are very 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 (degenerate into cancer). This form of cancer is known as malignant peripheral nerve sheath tumour or malignant Schwannoma or neurofibrosarcoma.

Schwannomas can arise from a genetic disorder called neurofibromatosis.

More discussions about neurilemmoma
References in periodicals archive ?
MPNSTs are spindle-cell sarcomas that arise from nerve, neurofibroma, neurilemmoma, or tissue containing nerves.
3] Any nerve which have a schwann cell sheath may give origin to a Schwannoma or Neurilemmoma and so, this neoplasm may develop in almost any part of the body.
Malignant peripheral nerve sheath tumor (MPNST) was previouslyknown as malignant schwannoma, neurogenic sarcoma, malignant neurilemmoma, and neurofibrosarcoma.
MPNST also known as neurogenic sarcoma/malignant neurilemmoma /malignant schwannoma.
Bone, right distal Osteochondroma with no definitive femur evidence of malignancy Skin, face, biopsy Sebaceous carcinoma Bone, left humerus Osteosarcoma, well differentiated Bone, mandible Low-grade chondromyxoid tumor Brain, septal lesion Recurrent medulloblastoma Soft tissue, left arm Neurilemmoma (schwannoma) Brain, posterior Oligodendroglioma cranial fossa Thyroid gland Follicular carcinoma?
Multilobular neurilemmoma of the tongue in a child.
We report a case of a neurilemmoma presenting as a midline nasal mass in a 13-year-old girl.
Rarely, conventional osteoblastomas may have regions of marked cytologic atypia similar to that seen in symplastic leiomyomas or ancient neurilemmoma, so-called pseudomalignant or pseudosarcomatous changes.
Neurilemmoma of the breast in a man- A case report.
These authors reported 2 cases with clinical-pathologic features consistent with IPM, although the cases were diagnosed as malignant neurilemmoma by Deligdish et al and as neurilemmoma by Katz.
INTRODUCTION: A case of Neurilemmoma of Nasal Septum was first described by Bogdasanian and Stout, (1) schwannoma was benign encapsulated nerve sheath neoplasm composed of Schwann cells first described by verocay in 1908, stout (1935) coined the term neurilemmoma believing that this tumor arises from cells of sheath of Schwann which may also develop in any part of the body.