The result of a knee disarticulation amputation allows the distal redundant tissues, which were left mobile, to be actively ranged from full extension to approximately 45 degrees of simulated knee flexion. It could not be determined from the intraoperative notes whether a myoplasty or myodesis was performed, however, the patella was left intact.Several previous attempts at prosthetic fitting were tried. Both transtibial and knee disarticulation designs were used, with less than desirable outcomes.The current approach focuses on the ability of the patient to actively range the distal tissues of his residual limb. Using the elasticity of the ALPS Clear Pro liner for mobility and suspension we were able to use the locking pin as a pseudotibial lever. The prosthetic design incorporated a supracondylar/suprapatellar type of socket with joints and corset, ALPS Clear Pro liner with clutch lock, Otto Bock endoskeletal components, and an Otto Bock single axis foot.