Professional
Technical
IVT
boutonniere deformity
Pronunciation: boo-ton-ee-AIR
Finger deformity with PIP flexion and DIP hyperextension due to central slip injury.
Full Definition
Boutonniere deformity is a characteristic finger deformity resulting from injury to the central slip of the extensor mechanism at the proximal interphalangeal joint. The injury allows the lateral bands to slip volarly, creating a flexion contracture at the PIP joint and compensatory hyperextension at the DIP joint. The deformity resembles a finger poking through a buttonhole (boutonniere in French). Common causes include trauma, rheumatoid arthritis, and burns.
Usage
Usage note: French term meaning 'buttonhole.' Do not italicize in medical writing. Opposite of swan neck deformity.
In Context
- "Physical examination revealed a fixed boutonniere deformity of the index finger." — orthopedic consultation
- "Acute boutonniere injuries require immediate splinting to prevent permanent deformity." — emergency treatment protocol
Also known as
buttonhole deformity
Contrasted with
swan neck deformity
Don't confuse with
swan neck deformity
mallet finger