Definition of Schwannoma

1. Noun. A benign nerve sheath tumour composed of Schwann cells. ¹

¹ Source: wiktionary.com

Medical Definition of Schwannoma

1. 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 neurilemoma may develop within the sheath of the nerve, the fibres of which may then spread over the surface of the capsule as the neoplasm enlarges. Microscopically, neurilemoma's are composed of combinations of two cell types, Antoni types A and B (see below), either of which may be predominant in various examples of neurilemoma's. See: neurofibroma. Synonym: neurilemoma, neuroschwannoma. Origin: Theodor Schwann + -oma (05 Mar 2000)

Lexicographical Neighbors of Schwannoma

schusses
schussing
schuyt
schuyts
schvartze
schvartzes
schvitz
schvitzed
schvitzes
schvitzing
schwa
schwag
schwan's sheath
schwann's white substance
schwann cells
schwannoma (current term)
schwannoma derived growth factor
schwannomas
schwannomata
schwannomatosis
schwannosis
schwarmerei
schwarmereis
schwartze
schwartzembergite
schwartzes
schwas
schwertmannite
schwertmannites
schwing

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