TFCC Tear

What it is

The triangular fibrocartilage complex (TFCC) is a group of tough tissues on the small-finger (ulnar) side of the wrist. It stabilizes the joint between the two forearm bones and cushions the end of the ulna against the small wrist bones. People whose ulna is longer than the radius have a thinner TFCC that tears more easily.

What causes it

Most tears come from natural wear and become more common with age. Others follow an injury: a fall on the wrist, a sudden twist (such as a drill catching), or a distal radius fracture.

Symptoms

• Pain on the small-finger side of the wrist
• Clicking or popping when turning the forearm or moving the wrist side to side
• Weakness or limited motion

Tears are often seen on MRI in people with no symptoms at all.

Diagnosis

Several conditions cause pain in this area, so specific examination maneuvers by a hand surgeon help pinpoint the TFCC. MRI or wrist arthroscopy may be used.

Treatment

Only tears that cause symptoms need treatment. Options include splints, activity changes, anti-inflammatory medication, and injections. If these do not help, arthroscopic or open surgery can repair or clean up the tear, depending on its type.