Avulsion fractures of the lateral tibial condyle in children.

Avulsion fractures of the lateral tibial condyle are very rare in children and adolescents. Seven patients were treated between 1986 and 2000. They were all involved in sporting activities and an acute contraction of the fibres of the iliotibial band was considered to be their common pathogenetic factor. A subdivision in two types of avulsion fractures according to the anatomic location of the lesion was used. The Segond fracture, a small vertical avulsion fracture involving the midportion of the lateral tibial condyle distal to the plateau but proximal to the physis, was diagnosed in five patients. In two of them it was associated with a fracture of the anterior intercondylar eminence. The avulsion fracture of the Gerdy's tubercle was diagnosed in two other patients. The detached fragment was bigger, more anterior and involved a part of the articular surface of the lateral tibial plateau as well as a part of the physeal plate. All patients were treated conservatively and were free of symptoms after a mean follow-up of 9 years.