gamekeepers

Definition

Injury to ulnar collateral ligament of thumb MCPJ

Interferes with pinch grip and grasp and thumb is ineffective as a post

Nalebuff Classification

Type I - Boutonniere 

- commonest

- MP flexion /  IP hyperextension

- usually EPB rupture with EPL subluxation

Type II

- Boutonniere & Swan Neck

- doesn't exist according to Nalebuff

Definition

Injury to ulnar collateral ligament of thumb MCPJ

Aetiology

Initial description

- chronic laxity of British gamekeeper's thumb's 

- no specific trauma

- secondary to breaking pheasant's neck

Acute trauma

- snow ski

- ball games

Valgus / forced abduction

Anatomy

UCL