Fig. 6From: Outcomes of surgical treatment of patellar instability in children with Down syndromePreoperative and postoperative radiography. (a) True antero-posterior view. (b) True lateral view of the right knee. (c) Axial view of the right knee in 400 knee flexion, showing a laterally dislocated patella. (d) Postoperative axial view of the same knee in 400 knee flexion, showing a well-reduced patellaBack to article page