Last revised by Yahya Baba on 7 Jan 2021

A cyamella is a rare sesamoid bone that exists as a normal variant within the popliteus tendon, characteristically located at the lateral aspect of the distal femur in the popliteal groove.

Cyamella is best seen on the AP view of plain radiograph as opposed to fabella, which is best appreciated on the lateral view.

It is seen more commonly in less advanced primates 3 and in a high proportion of dogs 4.

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Case 1
    Drag here to reorder.
  • Case 2
    Drag here to reorder.
  • Case 3
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.