synovial cyst

gan·gli·on

, pl.

gan·gli·a

,

gan·gli·ons

(gang'glē-on, -glē-ă, -glē-onz),

1. Originally, any group of nerve cell bodies in the central or peripheral nervous system; currently, an aggregation of nerve cell bodies located in the peripheral nervous system. Synonym(s): nerve ganglion, neural ganglion, neuroganglion

2. A cyst containing mucopolysaccharide-rich fluid within fibrous tissue or, occasionally, muscle bone or a semilunar cartilage; usually attached to a tendon sheath in the hand, wrist, or foot, or connected with the underlying joint. Synonym(s): myxoid cyst, peritendinitis serosa, synovial cyst

[G. a swelling or knot]

gan·gli·on

, pl. ganglia, pl. ganglions (gang'glē-ŏn, -ă, -ŏnz)

1. [TA] An aggregation of nerve cell bodies located in the peripheral nervous system.
Synonym(s): neuroganglion.

2. A cyst containing mucopolysaccharide-rich fluid within a fibrous capsule; usually attached to a tendon sheath in the hand, wrist, or foot, or connected with the underlying joint.
Synonym(s): myxoid cyst, synovial cyst.

[G. a swelling or knot]

synovial cyst

Accumulation of synovia in a bursa, synovial crypt, or sac of a synovial hernia, causing a tumor.

See also: cyst

synovial cyst

; dermoid cyst; mucoid cyst small, discrete, palpable, fluctuant, transluminant swelling of dorsum of digit, due to synovial membrane herniation (i.e. arthrocele formation) from distal interphalangeal joint; may rupture through overlying skin, or cause local nail matrix pressure with resultant nail plate deformity