Piano Key Sign

Published July 2, 2026 Read time 1 min read Readers 3
Piano Key Sign

What is the "Piano Key Sign" used for?

  • Stability of the distal radioulnar joint (DRUJ)
  • Triangular fibrocartilage complex (TFCC)

How to perform the "Piano Key Sign"?

  • Depressing the distal ulna from dorsal to volar with the hand pronated.

What is the positive result?

  • 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.

References