Fig. 1

a, b AppearanceĀ of the right knee at the time of admission, and the arrow indicates infected sinus; c frontal and lateral radiographs of right patella at the time of admission; d infected bone and soft tissues were observed during operation; e intraoperative appearance afterĀ thorough removal of infected bone and soft tissues, and cavities were implanted with RBK beeds; f wound repaired by lateral gastrocnemius flap and skin graft