metacarpal bossing
A painful prominence at the base of the second and third metacarpals.
Full Definition
Metacarpal bossing is a condition characterized by a painful, prominent bump on the dorsum of the hand at the base of the second and/or third metacarpals where they articulate with the carpal bones. The condition results from osteophyte formation, joint irregularity, or developmental prominence at the carpometacarpal joints. Patients typically present with localized pain that worsens with gripping activities and a visible or palpable prominence. Conservative treatment includes activity modification and corticosteroid injections, while surgical options involve excision of the prominent bone and any associated ganglions or inflamed tissue.
Usage
Usage note: Most commonly affects second and third metacarpals; may be associated with ganglion formation.
In Context
- "Physical examination revealed tender metacarpal bossing at the second CMC joint with overlying inflammation." — Clinical evaluation
- "Surgical excision of the metacarpal bossing provided complete pain relief at six-month follow-up." — Post-operative assessment