An ongoing update of the progress case report for the first patient treated with the Longitude™ osseointegration prosthesis implanted in an amputated residual femur is presented. The patient was given an intensive physical therapy program of strengthening and conditioning in anticipation of coupling to the external prosthesis. A custom prosthesis was fabricated based on the Plie’ 2.0 microprocessor knee system. The patient was then successfully trained on use and care of the prosthesis for ambulation without any complications.Keywords: Amputation, OsseointegrationAcknowledgement: Design concept by Concept Design & Development, LLC (CDD,LLC); Development and Manufacturing by Signature Orthopaedics, LTD; Centennial Hills Hospital Medical Center, Las Vegas, NV; and Institutional Review Board (IRB) by Joint Implant Surgery & Research Foundation.