swan neck deformity

Neurology A descriptor for a thin curved neck, resulting from muscular atrophy characteristic of myotonia dystrophica, often accompanied by ‘myopathic facies’—see 'Hatchet' face—myotonia, dysphagia, frontal baldness, testicular atrophy, cataracts; a variant of gracile swan neck is described in Modigliani syndrome
Pathology-kidney A descriptive term for the shortened and attenuated initial segment of a dissected proximal convoluted renal tubule seen by light microscopy in patients with De Toni-Fanconi syndrome
Rheumatology A descriptive term for the hyperextended proximal interphalangeal joint and compensatory flexion of the distal interphalangeal joints caused by shortening of the extensor tendon, classically seen in rheumatoid arthritis, but also in systemic lupus erythematosus, Jaccoud’s—post-rheumatic fever—arthritis, psoriatic arthritis, scleroderma, camptodactyly

swan neck deformity

Rheumatology A descriptor for the hyperextended proximal interphalangeal joint and compensatory flexion of the distal interphalangeal joints caused by shortening of the extensor tendon, classically seen in rheumatoid arthritis, but also in SLE, post-rheumatic fever arthritis, psoriatic arthritis, scleroderma, camptodactyly. Cf Boutonniere deformity.
References in periodicals archive ?
Reversible ulnar deviation, metacarpophalangeal (MCP) joint flexion, proximal interphalangeal (PIP) joint extension, and distal interphalangeal (DIP) joint flexion (swan neck deformity) were observed in both hands.
The ring finger did not develop superficialis-minus deformity or swan neck deformity.
Superficialis-minus and subsequent swan neck deformity are seen in about 15% of cases of superficialis harvest for tendon transfer [10].
Most common deformities are buttonhole deformity, swan neck deformity, and ulnar deviation of the metacarpophalangeal joints.
On general examination patient had pallor, deep icterus, swan neck deformity in the middle finger of right hand, boutonniere deformity in right little finger.
Greater deformity was observed in the right hand than left hand in our study with regard to piano key sign and boutonniere deformity, and no differences were detected concerning swan neck deformity, ulnar deviation, Z deformity, tenosynovitis, interosseous atrophy, or hypertrophic degeneration.