Carpometacarpal Joint Injuries

Anatomy

The Carpometacarpal (CMC) joint is the joint of the extension of the thumb to the wrist. The opposing joint surfaces are saddle shaped to allow more movement: flexion/extension, abduction/ adduction,axial rotation.

Wrist_CarpometacarpalJointInjuries_large

Mechanism of Injury

  • Generally due to forced hyperextension and abduction of the first CMC joint.

Symptoms

  • Pain with thumb movements.
  • Tenderness over the CMC joint.
  • Impaired mobility of the thumb.
  • There may be a joint deformity.

Treatment

Please consult with your medical professional for a complete diagnosis and treatment plan.