Skier’s or Gamekeeper’s Thumb
Skier’s thumb is the eponym given to injury of the thumb ulnar collateral ligament (UCL) at the metacarpophalangeal (MCP) joint. It is the result of excessive radial deviation at the MCP, as is causing during falling on an outstretched hand while holding ski poles. The causes attenuation of the UCL and can lead to varying degrees of injury, resulting in instability at the MCP joint. Treatment varies based on the degree of injury and instability ranging from prolonged immobilization to surgical repair or reconstruction. Surgical repair has been associated with good outcomes, and high rates of return to recreation/play (Schroeder and Goldfarb, Clin Sports Med 34(1):117–126, 2015).