Carpometacarpal (CMC) joint dislocation of the thumb is a rare injury caused by axial forces applied to the flexed thumb.

• 摘要拇指基底关节脱臼是一种少见的伤害，一般认为的机转是急性的外伤，来自于当拇指弯曲时向虎口的外力造成拇指基底关节韧带的伤害。