History: 50 year old man with knee pain.
This is an excellent example of a Bosch Bock bump, which is a healed Segond fracture. This finding is nearly 100% specific for prior injury to the anterior cruciate ligament. A Segond fracture is an avulsion fracture of the lateral tibial capsular ligament at the lateral tibial rim (the area of the yellow arrow in the image above).
thnx alot sir fr diagnose