Fig. 4

Serial X-ray findings according to progress. a Post-operative anteroposterior and lateral radiography of the right knee shows the oval-shaped small bony window that was made at the lateral aspect of the distal femur and reveals the drain insertion status. b Anteroposterior and lateral radiography after the fifth debridement shows that the bony curettage range was wider. c Anteroposterior and lateral radiography at the 1-year follow-up; the sclerotic rim is formed, and the bony window remains. There was no cortical destruction or periosteal reaction