Lateral capsular sign
The appearance of a Segond fracture on conventional radiographs as an elliptic fragment of bone parallel to the tibia, just distal to the lateral tibial plateau.
- Gottsegen, Christopher J., et al. "Avulsion Fractures of the Knee: Imaging Findings and Clinical Significance 1." Radiographics 28.6 (2008): 1755-1770.