A child born with arthrogryposis has joint contractures, or stiff joints. This means some of their joints don’t move much or may even be locked in one position.
Brachial plexus birth palsy
Brachial plexus birth palsy is an injury to a baby’s brachial plexus nerves, located between the neck and shoulder. It is one of the most common injuries that can occur during birth, and it often happens during difficult deliveries.
A child with camptodactyly cannot straighten their finger because the middle joint of that finger does not work correctly. Camptodactyly can happen in any finger, but it happens most often in the pinky finger.
Clinodactyly is when a finger curves toward the finger next to it. Clinodactyly can happen in any finger or toe, but the most common type is when the small finger curves toward the ring finger.
Finger thumb hypoplasia/aplasia
Hypoplasia is when a baby is born with a finger or thumb that is not fully developed. Aplasia is when a baby is born without a finger or thumb.
A ganglion cyst is a fluid-filled sac that often develops on the hand or wrist near a joint or tendon. It looks like a bump on the surface of the skin.
A mallet finger is a deformity of the finger that happens when the tendon that straightens the finger, or extensor tendon, is injured or damaged.
Having an extra finger or toe is called polydactyly. The extra finger or toe may be only soft tissue, or extra skin, but some include bones.
With radial dysplasia, the radius bone does not form like it should, and it may be short or missing altogether. The thumb may also be small, not work correctly or missing altogether. Additional bones and other structures of the forearm, wrist or hand may be abnormal or missing altogether. There is also often a curving of the forearm toward the thumb.
When a child is diagnosed with symbrachydactyly, it means their hand did not develop as it should have. This might include short hands or fingers, webbed hands or missing bones.
Syndactyly is when a child is born with fingers or toes that are joined. It is the most common hand difference that happens at birth.
Trigger finger is when a finger or thumb gets stuck in a bent position and then straightens with a snap. If trigger finger is severe, the finger may become locked in a bent position.