Fig. 5From: Treatment for lateral patellar impingement syndrome with arthroscopic lateral patelloplasty: a bidirectional cohort studyTypical case I: female, 41 years old, pain for 48 months. a Preoperatively, Lysholm score 74, CA 25°, PTA 10°, and PLS 9 mm; CT scan showed Wiberg IV patella. b After the operation on the left knee, Lysholm score 75, CA 1°, PTA 9°, and PLS 8 mm; CT scan showed approximate Wiberg II patellaBack to article page