boutonniere deformity


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Related to boutonniere deformity: mallet finger, swan neck deformity

bou·ton·nière de·for·mi·ty

flexion of the proximal interphalangeal joint with hyperextension of the distal interphalangeal joint of the finger, caused by separation of the extensor hood and protrusion of the head of the proximal phalanx through the resulting "buttonhole"; can result from degeneration (rheumatoid arthritis) or trauma.
A popular term for flexion of the proximal interphalangeal PIP joint and hyperextension of the DIP, caused by the detachment of the extensor tendon from the middle phalanx, volar displacement and resultant action as a flexor, associated with SLE, Jaccoud’s—post-rheumatic fever arthritis, rheumatoid arthritis, and camptodactyly

bou·ton·nière de·form·i·ty

(bū'tō-nyer' dĕ-fōrm'i-tē)
Rupture of the central slip of a digital extensor tendon at the middle phalanx, marked by extension of the metacarpopophalangeal and distal interphalangeal joints and flexion of the proximal interphalangeal joint.
[Fr., buttonhole]
References in periodicals archive ?
Hand deformities of the patients Deformities n % At least one hand deformity 95 93 Synovial hypertrophy 68 66.7 Metacarpophalangeal joint subluxation 26 25.5 Ulnar deviation of MCP joints 89 87.3 Radial deviation of the wrists 37 36.3 Boutonniere deformity 43 42.2 Swan neck deformity 34 33.3 Fusiform finger 37 36.3 Z deformity of the thumb 64 62.7 Caput ulna syndrome 18 17.6 Other deformities 15 14.7 MCP: Metacarpophalangeal.
The most common office complaints are described in detail: trigger finger, ganglion cyst, mucous cyst, mallet finger, Dupuytren disease, Boutonniere deformity, skier thumb, flexor tendon injury, carpal tunnel syndrome, and de Quervain tendonitis.