Piano Key Sign
- Piano Key Sign is used to test for:
- Stability of the distal radioulnar joint (DRUJ)
- Triangular fibrocartilage complex (TFCC)
- Depressing the distal ulna from dorsal to volar with the hand pronated.
- A positive result is characterized by painful laxity in the affected wrist compared with the contralateral wrist.
- The results are usually positive in cases of DRUJ synovitis.