<prompt> Game keepers thumb is:Thumb metacarpophalangeal joint ulnar collateral ligament ruptureThumb metacarpophalangeal joint radial collateral ligament ruptureThumb interphalangeal joint ulnar collateral ligament ruptureThumb interphalangeal joint radial collateral ligament rupture  <response>: GAME KEEPERSSKIERS THUMB Injury to the thumb metacarpophalangeal joint ulnar collateral ligament- most common injury of 1st MCP joint. Pain, swelling and ecchymosis around the metacarpophalangeal joint. On clinical examination, a prominent lump can be palpated, which represents the ulnar collateral ligament being displaced by the adductor aponeurosis. 