This condition results when there is partial or total disruption of the ulnar collateral ligament at the metacarpophalangeal joint of the thumb. It is also often associated with a fracture at the base of the proximal phalanx. This is also called a skier's thumb or ski pole fracture. The original condition was described in those gamekeepers who used their hands to kill rabbits. Special stress views may be required to see this dislocation , if clinically suspected.
 A | AP radiograph of the first digit. This shows a fracture at the base of the proximal phalanx. It is intraarticular. |
 B | Lateral radiograph of the first digit. This patient demonstrates the findings of gamekeeper's thumb with mild subluxation at the MCP joint. |
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