A Segond Fracture is an avulsion of a small chip of bone off the lateral side of the femur, commonly seen in association with an anterior cruciate ligament rupture.
Significance of a Segond fracture
The small avulsion chip used to be considered as an indicator of a torn anterior cruciate ligament (ACL), but nowadays it is generally accepted to be an indicator of a torn anterolateral ligament that occurs in association with ACL tears.
The Segond Fracture Is an Avulsion of the Anterolateral Complex. Shaikh H, Herbst E, Rahnemai-Azar AA, Bottene Villa Albers M, Naendrup JH, Musahl V, Irrgang JJ and Fu FH1. Am J Sports Med. 2017 Aug;45(10):2247-2252. doi: 10.1177/0363546517704845. Epub 2017 May 12.
Segond Fractures. Not Necessarily Pathognemonic of Anterior Cruciate Ligament Injury in the Pediatric Population Arneja SS, Furey MJ, Alvarez CM and Reilly CW. Sports Health. 2010 Sep; 2(5): 437–439.